At almost every single place where I've worked at previously, I was never
asked for a resume. I simply lucked out and got hired on the spot after
filling out an application. I wouldn't rely on luck though, because a lot of
places won't consider you without one.
Business cards... Don't know what to tell you on that one. They seem a little
superflous to me to include with a resume, but it sounds like something I'd be
willing to try out. I don't know a lot of bartenders/ servers who carry those.
Mostly people with manager positions. But maybe that's the key- having one on
you shows that you're serious and professional.