i know chess was suggested before but just to resuggest more super quick mini game.
A unique decoration in house system where we can play;
1)Chess (1v1)
2)Snooker/Pool (1v1 or more)
3)Bowling.
4)Riddle Man (an npc who gives u random riddle about arlor)

*all game is playable either player vs player or player vs bot/computer if theres no player wants to play with you.