I think it is a middle/high school fad. There are very few even in a school. I was emo my 9th grade year. Grown out of it in less than a year. I think it will die out eventually. I actually hope so :P I think a lot of emos go to concerts and stuff like that. I am sure they go to malls, restaurants, and grocery markets as well.
Depends what you mean by emo. Emo like the kids that dress in all black, dye their hair, pierce their lips and listen to screaming music = I don't see much of those anymore but I'm in college. Emo like people who listen to "emo" music like Snowing, Brand New, Dashboard Confetional etc. = those still exist and aren't so annoying.
I used to be back in middle school and part of high school. Grew out of it but I still like the music.
There are still emos but worse is the spin off "scene kids" O>O In art that I draw, enjoy and the music I listen to I would probably be considered emo haha but I like to think I dress and act quite normal. Whatever normal means...