Well, I like Flip Cup because its a simple beer drinking game. I do not like beer but if I have to drink beer, and not Vodka, then I would rather drink beer in a Flip-Cup tournament.
Its a team sport, and after several rounds you get drunk. It's a great icebreaker, and women and men can compete together in perfect harmony.
Also the pageantry of uniforms, referees, expensive equipment, and an audience are not needed.
I love it.