I'm afraid that is par for the course Marianna. No robe. But as I said, they have seen all kinds of figures and boobies, including women who have had implants, mastectomies, and reductions with swollen red scars, problems with sagging and drooping, flabby waistlines (like, uh, mine for example), body hair...am I painting a picture here or what? Keep an open mind, and if in doubt, just let your fitter know you're a little nervous. I'm sure she will understand and may even make accommodations.
There was quite a diverse group of women there the day I went. I wouldn't say any of them had an "ideal" size or shape, including me and my mom.
I am the shyest creature imaginable and it was a bit surprising but not terrible at all. The women there are very sweet and supportive...like the lingerie version of YLF.
The process:
1--they will tell you about how they determine your bra size, why they don't use measuring tape, and explain how to care for your bras (you will still have your shirt on at this point, don't worry :P)
2--they will take a look at how your current bra fits and base your new size and bra style on that. They'll basically pull on the band to see if it is too loose and see how the cups fit. You can get an idea of what this step involves by looking here at before and after pics:
http://www.myintimacy.com/bramistake.html
3--they will grab a ton of bras for you to try and make a "good" and "bad" pile for you to choose from. At this point I'm afraid you have to remove your bra, otherwise there is really no way you can put the new one on. They will show you how to put it on properly too, which is important.
4--you sort through the pile and pick the ones you want. Done.
This is a very standard Euro way of doing things. I have had things done the American way with American bras and ended up being given the wrong size and some of the most awful, unflattering granny-type bras! I don't recommend it.