I went to a group therapy once where the therapists made us go outside walk around campus in single file. Most of us looked down or uncomfortable so that drew even more attention to us. I suppose it didn't feel so bad knowing you weren't the only one suffering but still....
For me though being in the same room as those people and exposing myself was bad enough. Exposure therapy is a proven method, I believe in the concept of it, but it hasn't worked for me as well as I hoped.
This may be related and unrelated, but the only thing that has worked for me in shifting my perception of myself, is to have an impromptu speech infront of two strangers (therapists), and watch it back on film. Even though I felt anxious I saw on screen how personable and alive I looked. That made me see how well I could hide my fears. Also I worked shifts in a fast food joint that was quite intense, all the staring and talking with strangers made me not care much about other anxieties in my life at that time. With exposure, you have to keep it up, constant stimulation is the key. I have since relapsed and it is hard to get back that momentum again.