I would first try pocket doors. If your walls don't permit that, try bi-fold or double doors. The bi-fold doors can be painted / enhanced with moldings and an extra knob to give the illusion of a double door.

curtains.

Classic panel doors painted white. (Standard in new construction in New England, if not everywhere!) Keep both closed to avoid crashing into each other. (Six panel are common, I prefer 4 panel.)

She said she doesn't want curtains.

And I like the pocket doors idea, too, if they'll work with your wall space.

A low tech solution for the closet would be an oversized folding screen like this: http://www.invitinghome.com/Screens/screen_art_deco_3191.htm

Maybe a barn door on the smaller of the two doors?

Looks like there's not enough room on the side wall for pocket doors.

I go with SherryBinNH: panel doors. There are real wood ones that are beautiful, or less expensive, hollow core ones. Lowes. Home Depot. You can get bi-fold panel doors, or regular.

Also, instead of painting them white, why not look to a contrasting color. There's some great painted door looks in the AT archive.

It looks like you might be able to install a pocket door for the bathroom, assuming the bathroom and closet share a wall, there should be some space inside the wall there. That would have the added benefit of giving you more room in the bathroom. As far as the closet, you could get sliding closet doors that look like panel doors, but I would just go with double doors if you are able to do the pocket door for the bath.

BTW- Words cannot express how jealous I am of your enormous closet!

Pocket doors require tearing out walls - I don't think she wants to do that, otherwise she'd have done that already.

I think the closet just needs some bifold doors - either paneled or perhaps louvered doors for air circulation.

Home Depot or a building materials recycling store would have what the homeowner needs.

There's no room for pocket doors and you'd have to tear the wall up.

I don't think bifold doors will look good.

For the closet, I would put in double doors, using 6 panel doors painted white. I'd get the same type of door for the bathroom.

I live in almost an identical apartment.
I used the track system from Ikea. It works really well and is super easy to install!

She just doesn't know she wants curtains, It is really the best solution, many different patterns, cheap, easiest to install. Really it is the best answer

Curtains are a poor divider for the bathroom (noise and moisture) and will attract dust and various bugs (ergo, not so good for a closet). It will also be difficult to attain the "high-end look and feel."

But yes, it is indeed cheap and easy.

We installed bi-fold doors that are identical in their "molding look" to the other doors throughout our house for both our closet and bathroom in our tiny bedroom. They work perfectly!

Pocket doors or double doors that both open out for the closet...a pocket door for the bath(s).

Closet doors will fall pretty much in to 1 of these 4 types: Pocket, Sliding/Bypass, Bifold, and Hinged.

Pocket - Like many others have pointed out you would need to rip out the wall to install pocket doors. Even then, without seeing how wide the wall is along the left of your closet you may not even have room for pocket doors.

Sliding/Bypass - Your typical sliding closet doors will be 2 individual doors in the opening. The problem you'll have here is that half of your walk in closet will be covered at any one time. One option here would be to have the 3 doors instead, each on their own track. You will need a jamb at least 5" deep which it looks like you do. The benefit here is that now you will have 2/3rds of your closet open at any one time making it easier to get in and out. Another option we do from time to time is a surface mounted slider. They do look more like a barn door and might not be what you want, style wise, but you might have enough room to mount it to the inside face of your closet.

Bifold - We make a lot of bifold doors and one thing people are often not aware of is that there is closet track hardware out there that allows for up to 6 individual doors to fold to the same side. This means you could use any style of door, louvered, panel, fabric, whatever you want, and hang them as bifolds with all folding to the left of the closet away from the hinged door you show in your pictures. So even if the closet doors are left open you won't have to worry about walking in to the room and right in to the doors.

Hinged - 2 hinged doors would definitely look nice but the problem is they will stick far out in to the room. So if you are coming in to the room from the right you might just walk face first into one of those doors. As an alternative, one of lines of Johnson Bifold Track we sell with our doors can handle individual doors up to 48" wide and 108" tall. So if you really want 2 large doors in that opening you could bifold them to the left. Yes they will stick far in to the room but no more than a hinged door. Plus they will leave that doorway to the right wide open.

I hope this helps,

Jim