My wife and I joined the YMCA with a family plan....best move we coudlv'e made. I have been a member at Ballys and 24 Hour Fitness and I love the Y. We can go to any location in the area and get discounts on various activities and things (handy for us with 2 kids) plus the child care area is included...so our 12 year old can work out a little and our 6 year old goes to child care at no extra cost to us.
Love the flexibility of multiple locations too...we live pretty much same distance from two locations, one of them is an "Express" which is a smaller version of Y - weight room, cardio machines, and a room for cardio classes, etc. - also child care and locker rooms (of course). The other Y is a big one with basketball and raquetball courts, pool, etc. I go to the Express most of the time because it's less crowded, but go to the other Y to play hoops and we can all swim there, etc...
Highly recommend checking the Y in your area before joining another gym.