If you work full time, you really don't have time to learn new stuff all the time. My plan with our 3 Piece was, we learn about 30 songs, then mix and match three 10 song sets so it isn't the same show every gig. maybe throw in a new tune or two as we go to switch it up. learning new song all the time is alot of work.I undestand a church gig though is probably a different set every week but the same thing could apply ,learn a bunch of songs to have most of them committed to memory ,then mix it up every week, adding one or two new ones. My thing is, I dont want to sound unprepared and unprofessional in front of an audience, I dont care if I'm playing a voluntary gig, i want it to be good. I played a cancer benefit and musicians are like "it don't matter we aren't getting paid" I said it does matter there are people watching and listening.