I was discussing this with one of my best friends whom I've been hanging out with since high school and we were referring to one of his ex-gf's who was our age and still working in the service industry (one of the theme restaurants). If you are going to be a manager, owner or something that's fine, but if you are in your 30s working as a waiter or a bartender unless your paying your way through school, really need to think about another career.
I know I went on a tangent but this topic made me think about some of the people I went to high school with and are still working at a Fridays or something like that.