You all probably already do this anyway but: I play in your typical Classic Rock band and we play out 2-3 times a month. On Friday we had a gig at a local upscale bar. It was our second time there, and is a cool place to play. At the end of the night the manager gave the cash to our drummer who immediately pocketed it. After we were thru loading our gear, he paid us our share. Yesterday morning the drummer called me and said he mixed the gig cash in with his own money and thought we were overpaid. He could only estimate that he had $50-$100 too much money. I called the manager right away. He said he accidentally mixed in some money from a cash register with our gig pay (which included a $50 bonus) and ended up $30 short. I delivered the extra cash to him. He appreciated the fact that we caught the error. Cool thing is, he did ask to book us once a month for the near future.