I'm not a parent yet, so maybe this will make sense to me when I am... I'm lucky that the gym we found is nice, a lot of people there refer to it as "the club", since it has a cafe and a nice outdoor swimming/picnic area... but it's still pretty "homey" to me, especially after seeing the actual luxury-type gyms in the NYC area. I like it a lot. It's very family-oriented.
Anyhow, the indoor swimming area has a big observation balcony with bleachers, on the second floor between the cardio room and the yoga room. Whenever I go swimming, the pools are packed with kids (fortunately there's a grownup pool too), and the balcony upstairs is packed with parents sitting around chatting, sometimes with their other kids sitting there playing video games. But... why?? Why aren't those other kids playing basketball, or the climbing wall (kids love the climbing wall!), or swimming, or playing tennis, or chasing each other through the halls? Why aren't the parents (many of them as overweight as I am), not swimming with their kids, or taking yoga or a spinning class, or watching from the cardio room instead?
I guess I do "get" it... either they've already done their exercise for the day and they're relaxing, or they don't feel like working out. And I shouldn't try to project my own desire to work out and move around onto them, that's not fair. But man, it really surprises me to see all these families treating the gym like an extension of their couch, when there are SO MANY fun, healthy things they could be doing there!