Board games like... Monopoly, Pioneers or similar. Card games. If they are freaky... role playing games.
A dancing contest. Karaoke.
Nonsense games are also fun if people are voluntarily participating tea-bag-throwing (throw a dry tea bag into an aim or as far as you can with your teeth), fast chocolate eating contest (using knife and fork but not your fingers), the telephone game (whisper tetrahydrocannabinol to your neighbor ans see what the last person in the row understands...). things like that...
depends on what you all like but i think pictionary is really fun for all ages
spin the bottle, truth or dare. :)
Cards are always a winner!