We've been to Red Rooster on a Vegas trip, had no plan to play, just check it out (there's zero pressure which is always cool of the places).
There wasn't much for black males. A few but generally much much older and while they could hold a conversation just weren't her type. Mostly white males, wealthy individuals looking to play with both of us, which wasn't our thing.
It's worth checking out, we were there on a Thursday night, I heard it's usually busier on Saturdays.
Casinos are hit and miss anywhere there. Clubs, especially pool clubs might be better luck depending on the age you're looking for.