Whats with all this none of them will like you shit, this a
PUA forum for fucks sake, you engineer attraction.
In this situation I'd turn up the gas on being cocky/funny, I don't mean arogant and I don't mean be a clown and do it with them all equally. Get them talking about you, make them chase you. Also, be flirty with the female customers as well, but thats obvious.
Basically don't give a fuck and what ever happens you work in a bar woman are coming to you, easy. I would use this opportunity so much.