You get showoffs and oneupmanship any time a group of musos get together. Usually the showy players are the ones that get ignored while the ones that can actually play a song or jam with other musicians are the ones that end up getting asked up on stage every time.
I'm going to get back into the open mic thing, it's a good way to get out and play without the hassle of forming a band and (shudder) rehearsing.