So how strictly do casinos enforce the under 21 age rule? The reason I ask is I was in Reno a few years ago at the Hilton, and there were at least two under 21 kids at my table, drinking alcohol no less. They were friends of my nephew so I know they were under 21. Very surprised the Hilton didn't ask for IDs. It was mid week, quiet night, $5 table, so not sure if that made any difference. Haven't seen this at casinos in Eastern US.