I play music part-time, on top of my regular day job. I still get paid in cash quite often, both by the venue and via the tip jar. I give it to the kids, if I need to send them on an errand.

I also keep some singles in my bass bag, to tip bartenders. Most venues provide free drinks to the band, but then there's no way to give a tip unless I bring some cash.

Cash payments virtually disappeared after Sarbanes-Oxley, but have come back. Also, bandleaders are mostly using Venmo or its competitors when the band isn't paid in cash.