No one said being responsible means you can't have fun however you want, or maybe that's just the case for pirates.

Card games have a variety of different rules and they're usually played with a standard 52-card, 4-suit deck. There's variations though and the more people there are, the more decks might be used.

Tile games are things like dominoes, or mahjong, or pai-sho.

There's also chess, but I could never beat my Pops at it, so I have to admit I never got that good.