Pick a person in the front row, tell him " I used to have a shirt EXACLY like that before I got a job".
After no or very weak applause say "You know, they say that applause is like food to musicians.......thanks for the peanut".
A country song is requested "You know, they say that country music is supposed to speak to a man's heart.....the only problem is that it has to go through his ears to get there".
We just found out that (someone in the band) has perfect pitch. He is able to throw a banjo into a dumpster without hitting the sides.
"We're going to take a 15 minute break, see you in a half hour".
"I just found out today that I'm half black......the bottom half".
When you receive a relatively large amount of requests by the same artist and you don't play ANYTHING by them...announce "We refuse to play any of their songs since they refuse to play any of ours".
"Can you see my dick from out there? He's behind the drums".
The old, tried and true "Please don't forget to generously tip your waitress tonight. Everyone loves a waitress with BIG TIPS".
A request is made.....the band doesn't play it....you say..."There are only 3 songs in the entire world that we don't know, and oddly enough, that is one of them". They MIGHT ask for a different one, you say "Strike two"......they are ALWAYS tired of playing the game at that point and walk away.
"Here's a sad song.....and when we play it, it's down right pitiful".
"Don't forget about tonight's drink special....kids under 12 get shots of Jack Daniels half price".
"I'd like to introduce the band.....(do that....followed by a few more)....and behind the curtain is Mark on the trumpet". Etc. Possibly use "crouched down in front of the drummer is Tina on the Flute".
It's time to take a break.....simply announce "We've been great, thank you".