When I go out with my wife and kids I always pay.
When the kids invite my wife and I out to dinner or another occasion. I let them pay, but I leave the tip. Then I ask the waiter if he is happy even though I already know the answer.
I go out with my friends We fight for the check.
I go out with my wife's friends. It is embarrassing they divide the check then they talk about how much to tip. I hate that my wife's friends are nice people I hate that as well.