No problem with kids or wives, as long as they are behaved.
I never understood the desire to bring to the kids, or the rest of the family, but to each their own.
Our state has only been smoke-free for just about a year now, and it never ceased to amaze me how many people would bring their kids to the center, knowing that 80% of the people are smokers. One year we had a couple bring in their newborn. It was funny looking over and seeing the mother giving the baby a bottle, with a cigarette hanging out of her mouth and a beer in the other hand! Even funnier to watch the baby spit out the pacifer onto the floor and have the parent pick it up and stick it back in their mouth!
I would say the only time it is really a problem is because the center is always full - 40 lanes, 5 people per team. All tables have 4 seats, and there are just slightly more than 2 tables per pair of lanes (probably 45-50 tables total), so there really isn't enough seating for any "visitors."
Kids are only a problem when they start running around, weaving in and out between the tables and everybody standing around. In our league that was only a problem until one of the kids ran into the secretary, who happened to be carrying a pitcher of beer. Not sure what was said, but we don't see very many kids running around any more!