We're not really in a band (at this point) just trying to build a small set list and have some fun playing in a no-pressure environment. Were all old dudes (and a dudette) having some fun (at least that's the idea). Well, I actually work on this stuff at home and try to get it right. We all have varying degrees of talent/time/and inclination to work on this stuff. I guess I'm just here to get it off my chest that I told the rhythm player that what he was playing wasn't right, and it it's not right the rest will fall apart and it will be a train wreck. That rattled him and he said that he only really became familiar with his part two hours prior, and that he only considers himself a beginner guitar player anyway and how he didn't expect to hear "that isn't right...you're messing everything up" (referring to me) in an exaggerated accusatory impression of me obviously. So anyway, I felt about this low and tried to make amends as the rehearsal went on to encourage him and say how much better it was sounding and "yeah, you got it now...you really held us together there, etc..." I feel bad because I actually consciously TRY to remember that we are just there to have fun, but my ambition to be good and be right still got to me in a weak moment of frustration. I may just not be a very good person for these situations. I have basically avoided playing with people most of my life. The thing is, I have sometimes been the weak link in a jam situation so I certainly empathize with this guy. He's being asked to play chord and rhythms he's not comfortable with, and that's the whole point here...to get better. So this is not a defense of my actions, more like an opportunity to vent so I can stop beating myself up over it and try to use this whole endeavor to develop more patience with people and stop transferring how hard I can be on myself to others.