I'd recommend a pizza place. I did this for a couple of years and it was great. Along with making pizzas I also did deliveries which was cool because I could get really high, drive around listening to my music, and make good tips. One guy actually gave me a joint as a tip. The free food didn't hurt either.

I'd stay away from the fast food places like McD's, BK, etc. Its a lot of hot greasy work and you'll come home stinking like a french fry every night.