Sessions without combat happen from time to time. Maybe not in every game. I definitely have known some GMs who plan a fight per session at least. Heck, in some games I've been a fight per session GM (in my defense it was a super hero game.)
My question today isn't whether or not yousee them happen, but do you like them? I've had several people claim some of their favorite sessions never had combat. I've had others say they hate them because it's easy for people to get sidelined.
Where do you lie? Do you like sessions without combat? Do you loathe them? Do you like them, but only once in a great while?