Civilians at blackjack are the worst overall.
Getting chastised about not playing side bets. They all say, "that's where the money is." And I reply, "why aren't you betting table max on it then?" That usually, but not always, shuts them up.
Most fun I've had in a casino was, again, at the tiles table. Just playing with a table full of drunk Asians is a blast.
I really want to learn, I even bought myself a set of casino used tiles to practice. I just haven't gotten around to learning the seemingly random pairs, ugh.
It's totally worth learning. Pretty low house edge, very slow game, lots of pushes -- your money will last a while. Learn the rankings, learn the strategy, learn a few delivery styles to use when banking, and you'll have a good time. Find an open table during off-hours and it will probably be empty; that's a good time to practice and get lots of help and pointers from the dealer (if they're friendly). Harrah's in the best place in Vegas to play if you're new to the game.
The only time it has almost become an issue is when it happen to be a younger typical looking douchy rich kid who made some remark about kicking my ass...