Some great suggestions here already (HT Wavelength, KTaNE, Love Letter, Codenames, and Mascarade), but Cockroach Poker is one of my favorites. It's extremely simple: 64 cards, 8 sets of 8 different "vermin". Distribute cards as evenly as possible across the group and pick someone to start. First player takes a card from their hand, slides it face-down to another player, and declares that it's a certain critter in the game (E.g. "This is a rat.") The other player can do one of two things:

• Accept the card: Say whether the first player was telling the truth or lying about what's on the card, then reveal. If the receiver was right, the giver takes the card back and puts it face up in front of themself. If they were wrong, the receiver puts the card face up in front of themself instead.
• Peek at the card, then slide it to another player (who can't have seen the card yet) and make a claim about what it is, which may or not be what the last person said it was. Then repeat this decision with the new giver and receiver. If only one player remaining hasn't seen the card, they have to accept and make a guess.

The first player to get 4 of a kind loses, and everyone else wins. It's always a smash hit when we play, provided you have 4+ people.

Also a big fan of Meow! The cult of cat, which is basically Mao boiled down to just the rules, which change from game to game since the rules are printed on the cards and are only active if they're in play.