¿Qué?

I'd like to know which hotel it was also.

Every beach I've ever been to in Mexico have sections that accommodate picnickers of all classes by tradition if not custom.

Could have been some low-paid waiter who was having a slow "propina" day and wasn't finding enough gringo turistos to rip off, and maybe decided to give our friend the gears because he looked like he was having too good a time. Takes all kinds.
I'm just taking a guess here, trying to read between the lines in the sand..