We don't do breakfast balls. But the other two @woodzie264 described are pretty much winter rules. I used to play a lot of tournament golf, so im just conditioned to play the game under those circumstances, even when im playing a game with a group where they are different rules agreed to.
But the rule I and my regular group let slide most often is re-teeing or replaying after a lost ball or OB. We just agree on a general place to play the next from with whatever penalty the shot usually is. Speeds things along and doesn't really effect the outcome of our money games too much.