Seems to me that if you are not having a good time that is when you need to say enough is enough. If you are not having a good time it will show in your playing. Music is suppose to refreshs the soul, clears the mind, and brings joy to your life. Some people like to put a long list of rules to a band to me that just kills the joy before you even get your instrument out of the case. Why bother their main interest is not the band just having some kind of control or power over the other members. It is my experience that these are the people that have little actual musical talent so they make up for it by being bossy fun suckers. I can see if it is a band that is getting payed and the members are doing it for a living then more rules come into play and are required. If it is a church band or similar then it should be more loosely structured where any interested members feel like they can be apart of it. I do not know how you could exclude a member of the church from the church band that wanted to play. Would you ask a member not to sing hymns? I would hope not. Loosen up anyone up for a little I, IV, V acoustic blues.....

Have a good one,
Pete