You call and ask to speak to the person who does the hiring. (9 times out of 10 - they ain't hiring) Tell them you dropped off your application and would like an interview. Ask questions like when are you interviewing - what jobs are open - and before you even ask how much the pay is, or when are the vacations - you let them know that you're willing to work any shift (if you are) that you want to start at the lowest level and work your way up.