I'm currently playing with 4 different line-ups, so I've been trying to keep up with all the different set lists. Of course, the different line-ups have some overlapping members and one is an acoustic duo that plays mainly simple 3 and 4 chord songs. I pretty much just learn enough to fake my way through them on my own, and if we get a rehearsal I will work on a specific way to play it with the band.
Some of the diverse songs I've been trying to cram are:
Billy Jean , Valerie-Amy Winehouse, Honesty-Billy Joel, Uptown Funk, Black Velvet, Takin It To The Streets, Jesse's Girl, Dreams-FM, Black Friday-Steely Dan, Beginnings-Chicago,......
I could go on with more but I should start practicing.