One of my favorite games to play is Tetris, which isn't great for big parties but nice for small groups who enjoy taking turns. Yes, there are multi-player versions, but for some reason I really prefer using Dr. Mario for that kind of game. The peppy music and Mario tossing pills is just fun for two players.
Tetris is more relaxing, even if you do have people watching and waiting for a turn, and I've always chosen the flute music because of that. Now that I've seen Tetris Effect on Xbox, I don't know if I'll ever love the original the same way. This game is absolutely breathtaking and bound to make you feel less stress while you watch fish, jellyfish and horses go by. Each level just outdoes the previous one in terms of beauty.
Have you played Tetris Effect? What did you think?