When I was in college at CMU, Larry & Carol's was a main part of my diet. In addition to having 5 phone lines (so you could always get through), they were open till 3am doing brisk delivery business on campus with their delicious toasted sandwiches and pizza.
These days when I'm back in da 'Burgh to visit the parental units, I always stop off at Larry & Carols and pickup a footlong sandwich for old time's sake!