D
Another thought....
When I was in a cover band...We played songs on the heavier side (sort of)...
Alice in Chains
Journey
Blink 182
Ozzy
Deep Purple
etc.
BUT
We threw in "Sweet Caroline" from Neil Diamond and it was an instant hit with every crowd!! From the business executive crowd after work on a Friday night to the sleazy biker bars on a Saturday night...EVERYONE sang along, especially the BA BA BA part and the So Good, So Good part. Talk about getting the crowd into it.....it was like we were throwing a party in our living room and everyone was invited.
LOL, Back in the 80's when "Bang your head" by Quiet Riot was a hit, my band would do the intro, then go into "make it with you" by Bread. Total 180° turnaround. The metal heads cursed us, but everyone else got a good laugh and slow danced.
You can also do some humor by taking requests, then sing the lyrics of the requested song while playing some generic progression (G-C-D or whatever) Then take another request and play it to the same progression. Then ask for another request. After a couple or three "requests" the joke will be realized. Except by the drunks.
Come onstage after a break and tell the crowd the singer has OD'd, converted to the Amish faith and can't use electrical equipment anymore, or something else equally shocking. Start a song, and when the lyrics should come in, explain to the crowd that this is where the singer (or guitar player, or whatever) would come in, but doggone it, they left. YOu still have the rest of us and we're going to go on with the show. When the crowd is beginning to wonder "What the....", have the missing member come in the front door and make their way to the stage and explain that their OD, religious conversion, whatever didn't work out and jump into the song for real. The Smothers Brothers used to do stuff like this all the time, there might be clips on YouTube.