This would fall in to the “my two cents” category…if you are having an event with a live band, they should play mostly covers. I’m not talking about a concert, but an event where there happens to be music, dancing and general merriment. The crowd is much more likely to get into the mood if they hear “Twist and Shout” or “Tequila!”
It sucks when every song is followed by: “And you can catch that one on our new CD: Magic Balloon. Just visit our website: blah blah blah”