I have been playing in bluegrass jams for many years, bringing my banjo, guitar, and upright bass, and playing what ever fits in the jam the best based on what's there and what's needed. If there is already a bass there, mine sits. If there are at least 2 banjos, who needs a third? Guitar will always work, if you make it work.

I guess what annoys me the most is when some players, and believe me, they are not always the inexperienced ones, don't know when to back off and compete with someone's acknowledged break or try to play a lead while someone is singing a verse.

Playing with people is not about one's self. It is about cohesion. Listen to where you fit.