1. Every musician in the venue now thinks you’re a douche bag.
2. Every employee and bartender in the venue now thinks you’re a douche bag.
3. The joke is OLD. I mean, the newest reference to it in the media was Beavis and Butthead, and if you’re into quoting Beavis and Butthead you should really consider paying attention to some of the newer iconic retard parodies of the last decade.
4. People may assume you’re wearing Dockers.
5. People may assume you’re wearing shorts and/or sandals.
6. It’s just flatly inappropriate unless someone around you is currently doing a keg-stand.
7. It will vastly decrease your chances of getting laid.
8. The bartenders will think you’re a poor tipper.
9. It gives the person standing next you permission to slap you.
10. You’ve just announced to the crowd that you’re not a musician, you have no creative talent, and that you’re very insecure with yourself when naked.

-Christian