A fruity martini
What you're playing: A goofy slot machine
You're a girl in her 20s and your date from Plenty of Fish hasn't shown up yet. It's cool. Just sit down at the next slot machine that catches your eye. It probably has a theme like Ellen, Friends, or Wheel of Fortune. If you lose more than 20 bucks, hurry up and text your date to find out his ETA. At least you're not paying for dinner... hopefully?
What you're playing: Keno
You're an old woman from the Northeast who's in her 60s. Maybe older. You make a point to visit Vegas at least once a year because Atlantic City ain't what it used to be. Now that you think about it, Vegas ain't what it used to be either. But it's still better than Atlantic City.
Anything in a mason jar
What you're playing: Sports betting
You're at a big hotel on the Strip and you just finished dinner at a trendy new restaurant. The girl at the host stand has kindly offered to pour your colorful cocktail from that mason jar into a plastic cup so you can take it with you on the casino floor. Now what? Well, the sports book is nearby and you've always wanted to bet on a UFC fight... or a ball game... or the Kentucky Derby... or... ?