This exercise is about maximizing tips by setting up rivalries that will get support from people.  I dance Salsa, so the only bar-type environment I’ve ever experienced is Salsa night.  Here are some rivalries that might get some people voting with their tips:

On-1 Vs. On-2

Old School Vs. New Guys

Salseros Vs. Bachateros

Live Music Vs. DJ’s

I always tip well, even if all I get is a soda.  On each of these, I would put my money in On-1, Old School, Salseros, and DJ’s.