With the success of chess-boxing, here are some ideas for other hybrid games, some of which probably already exist but I'm too lazy to look up:
- Marathon Tic-Tac-Toe: Opponents play successive games of tic-tac-toe with only short breaks for biological necessities (except for sleep) until one of them forgets how to not lose.
- Archery Tic-Tac-Toe: Probably too easy for people who are already good archers.
- Archery Chess: Firing downward from a balcony onto a chess board, opponents must nudge pieces in legal chess moves.
- Billiards Chess: A chess board is laid out on a billiards table with balls as pieces, and the cue is used to tap, bounce, or ricochet the balls in legal chess moves.
(Thanks to Alex T. for joining me in brainstorming. She wants no credit or blame for the marathon tic-tac-toe idea. That one is entirely my fault.)