I worked at a Coldstone Ice Creamery. For those not familiar, the employees are required to sing whenever someone drops cash in the tip jar. Generally we just do a short low-effort jingle with the lyrics replaced with words like "Ice cream" and "tips".

(Short tangent, seriously the singing for tips shit is fucking ridiculous. See Aziz Ansari's stand up; as soon as that came out, we had dozens of middle-school fucks flood the store dumping pennies in the jar yelping "Sing! Sing!")

One day a customer told my boss she wished she heard other songs more often, that the ones we sing are too short and lackluster. This deeply affected my boss; he went through this two-phase process of being deeply offended then struck with blind inspiration, sending him to the store computer typing away.

I received an email later that shift right after he left the store for the day. The boss had emailed 5 employees stating that we would be holding a "band practice" shift soon, mandatory for all contacted employees. I couldn't fucking believe it, but he was seriously bringing his old high school friends to the store with their instruments. And five of us would be learning "new tip songs".

After a fucking ridiculous shift where I had to help come up with ice-creamified lyrics to "We Will Rock You" by Queen and "Treasure" by Bruno Mars ("We Will Serve You [Ice Cream]" and "Sugar"), our boss planned a day where the band would be playing in the store during peak hours.

The day arrived and in the first 2 minutes the "band" of middle-aged rock stars rocked too hard for the poor ice creamery and blew the power. Boss couldn't get it started but was so fired up about his genius idea that he decided to play anyway; now all you can hear are the drums and the singers (us employees). We tried to tell boss-man-Axel-Rose that MAYBE we should just stop for the day, but he was set on delivering the Woodstock of all ice cream parlors.

About an hour into the shift later we had played the same two songs with drums and vocals over and over again, and every customer that came in either immediately left or ate outside. Eventually BOTH stores adjacent to ours asked us to stop with the drums. Finally the property security came and called it off. My boss was blindly proud and still talks about setting up a reunion tour to this day.

TLDR: My Coldstone boss set up a rock band to play at the store for tips and it was fucking horrible.