Same here.
We had large amounts of side work, including food prep.
Also required to help bus tables when necessary, work cashier, load dishwashers and the few that were really handy...help the cook.
It never occurred to me to say...hey, you aren’t paying me to do that. I’m gonna sue!
Different times I guess.
It’s not the fact they have to do duties outside their core-responsibilities, it’s the fact that they aren’t being paid a suitable wage when they have to do those duties and forego tips.