Decent sized club with good looking...

Decent sized club with good looking girls. Added new VIPS rooms about a year ago. This is a nice clean club with nice waitresses as well. Except for one... i gave her a $5 for a drink and the drink only cost $3. She then asked if i needed change and she was like "you want change?" in a really nasty voice. I said... yea... why wouldn't i? She said... what about my tip? I'm not sure if it's customary to give a $2 tip for her just bringing out a $3 drink. I probably would have given her $1. I mean... that's already 30% of the tab. I dont really see an issue with that. Anyways... i was offered a few LD's and they went pretty well. I was pretty bummed out about the whole waitress thingie though. I know they work on tips... but $2 tip? for a $3 drink?