it's reeeally hard to get a job bartending or serving (with no previous experience) if you're just gonna be here for the summer then leave again for college - three months and then you're gone. managers dont wanna waste that time training someone just for them to leave. however; i do have interviews at a few sports bars just cuz i have some serving experience, thank god.
lifeguarding is always what saves me in the summer when no ones hiring. usually one pool or another needs someone. look into gyms too. they'll give you free membership for working there - kill two birds with one stone. i'll probably fall back on guarding if i dont score those waitressing/bartending jobs.