I don't know about other cities, but in Columbus, OH, my anarchist friends tend to work at (a) Kinko's; (b) coffee shops; (c) book stores; (d) CD stores; (e) video stores; or (f) vegetarian restaurants. A few of them are computer programmers. (Given the anarchist dress code & political/cultural outlook, job options for them are rather limited.) The most political among them prefer the graveyard shift at Kinko's, because they can make flyers and giant laminated posters at work. I'll be damned if working at Kinko's makes you "middle-class."
A few years ago, I recall an IWW woman named Miriam Fried made a great stir by spearheading union-organizing at Borders & getting fired for it, so it's not just the Columbus, OH phenomenon. Young leftists -- not just anarchists -- are most often found in the sector of the workforce that has expanded since the 70s: low-wage service industries. Culturally savvy (with or without college degrees), but paid so poorly that we can hardly expect to save for retirement. All big expenditures (like medical bills, vacations, household appliances, etc.) have to be put on credit cards. Welcome to the clean, well-lighted place of Negative Net Worth: "Our nada who art in nada, nada be thy name thy kingdom nada thy will be nada in nada as it is in nada. Give us this nada our daily nada and nada us our nada as we nada our nadas and nada us not into nada but deliver us from nada, pues nada. Hail nothing full of nothing, nothing is with thee." The young American proletarians have nothing to lose but their consumer debt. They have a world to win!
Yoshie