Cleaning up has never failed to send the "party is over" message. I'm surprised that anyone over 30 wouldn't get it. Seriously??

You could always try the direct approach:

Stand up, yawn & stretch, and say: "It's been lovely having you all over, but I'm going to have to call it a night. Can I get your coats for you?"

Agreed on the direct approach. As long as it's cordial, there's no shame in declaring your own party is over.

For those one or two stragglers I've even said (with genuine hospitality), "you're welcome to stay and sleep on the couch/guest bedroom, but I'm afraid I have to turn in." Some guests may like to stay late, but few will want to stay the night.

I could have used this a few weeks ago - had a few stragglers.

I remember a New Years' Eve at my place where I was exhausted around 5 or 6 am, and the conversation restarted in the entryway around one of my works hanging up on the wall... and lasted at least 45 minutes. I remember saying "Listen if you all come back tomorrow I'll take everything out of the closet and explain everything you wan't but please....".
So everyone was going to leave, but the same person started a new conversation... in the doorway for another half hour. I never reinvited him.

I tend to do sleepy-eyes, and mention how I can't wait to go to sleep because I have to get up early. Seems to do the trick.

I do have a few recurring guests (more like pests) that constantly take a whole encyclopedia of tricks to get out. One time, I literally got ready for bed... turned down the covers, brushed my teeth and washed my face, changed into my pajamas... all the while they happily continued chatting me up. That was the worst time, and it took about an hour after the dozen or so other guests all made a mass exodus (there was a definite end time to the event).

Once, out of desperation at 3am, I just put on a reeeally bad comedy record. It was so cringeworthy that the last few stragglers (of course, a few people I barely knew) made a quick exit, giving my remaining good friend a laugh and a chance to say a proper goodbye.

I'm with nashdp. I have said that before, "You're welcome to hang out as late as you want but try to keep it down 'cause I'm going to bed. Cheers!"

Euch, my worst... Our guests tend to linger at the end of the day and my kids get more and more tired, cranky, bouncy... And the guests, usually kid-less ones look at me like what is wrong with my kids, natter, chatter...

My great uncle had the solution - and he made it all the way to 97, he must have done something right! - Always used to get up and while moving towards the exit, politely say:"I am so sorry you have to leave now, we have had such a love evening together."

I do it myself now and it works - really, try it!

I am more of a night owl than my husband, and am usually happy to stay up late chatting. But at some point, he just gets up and goes to bed. He changes into his PJs, loudly brushes his teeth with the electric toothbrush, kisses me goodnight and goes to bed. This usually sends people on their way well before I get around to being tired of them.

Hahaha se7en, that's brilliant.

I am usually pretty direct. Since the people who visit me are usually friends or family, I don't feel bad about telling them to go home.

But this only when I really have to. I am a bit of an insomniac, and more often then not I can stay up all night with my guests.

I would say the direct approach is best, but the most hilarious was a story told when I was growing up about a local pastor who didn't like to stay up late. So when he had company and it was later, he would stand up, stretch, and announce "let's pray before y'all leave." Never failed. And it cracks me up.

My friends know I am usually an early to early person, so the zombie look in my eyes usually tips them off. If not, I just announce that I want to go to bed and it usually goes over okay.

We tend to entertain in small numbers and both of us are more of the "we're going to bed, there's the couch if you want to stay over" type.

Most people don't abuse the privilege, but we had one friend who would regularly take the couch and linger the next day as late as lunch!

With people I know can talk til tomorrow, My new york city trick is to do the - hey lets go to x bar for a quick one. Walk half a block, and go home after 20 minutes.

My friends love me and I love them, so they always laugh when I say, "You ain't gotta go home, but you got to get the hell up outta here!"

Hey, it works!

:-)

Now I'm beginning to worry as I'm always sad to see my guests leave. On the other hand, I never invite people I don't want to entertain.

I've only had this problem once, and it was the day after my son was born. We were living in London at the time (I'm from Iceland) so our closest relatives weren't around, but my husband's auntie and best friend came over. We came home from the hospital at 3 in the afternoon having not slept for two nights in a row (first one because of contractions, second night just staring at the baby). At first it was really nice, they cooked dinner and admired the baby, but at 10 in the evening I was starting to wonder how long they were going to stay. I got ready to go to bed and said something like "well we're a bit tired, I think I'll go to bed", gave my husband a kiss and left the room, thinking they'd get up and go. Not so! At 11 I went out and just said "I think you should go now, we need to sleep!". It was almost midnight before their taxi arrived!

http://www.notyourgoddess.blogspot.com/

Guess this would only work if you have people actually staying at your place and you live where it snows...

A few years ago my family decided to have Christmas at my place - a small apartment. My mom stayed with me (which means I slept on the couch) and my brother and sis-in-law (with 3 kids under 8 years of age) got a hotel room but hung out with us all day and well into the evening. After 3 days, my son and I were glassy-eyed - we love our family, but just weren't used to having so many people around on a constant basis, TV going constantly, and 3 kids arguing.

The 4th day dawned very cloudy and cold, and when my mom mentioned it I said I'd watched the news the previous night after she'd gone to bed, and there was a storn coming in with a 30% chance of snow. Everyone was packed and gone within the hour.

making coffee seems to be a good universal sign: time to sober up and hit the road, folks.

Inverting the usual "ah, we better leave cos our hosts probably need to go to bed" normally works, that is, if you live with someone else: "Well, (insert whatever name of partner/flatmate), we better go to bed, cos these people (guests) probably need to go home"...

at a dinner party, serve tea or coffee and then start to clean up.

coffee = the night is over.