Hello Beth!
In my opinion, you will love Seacrest Beach North. We have a home there and the community is great for families, and the pool is amazing.
There is not a clubhouse in the development, and I don't know of a place to play pool ... but no doubt there is a restaurant/bar somewhere along 30-A that has pool. I have never been in a place anywhere along 30-A that isn't family friendly, and Florida has a strict law against smoking in restaurants, so you don't have to worry about anywhere they might find to hang out. We like nearby Shades at the Loop, a restaurant/sports bar. I don't think they have pool but they do have a small arcade.
The beach looks lovely. We were just there last month and it is nice and wide. The walkovers are new and safe and everything is fine. Seacrest also offers shuttle service, via a large golf cart, to the beach access for owners and guests.
If you have more questions, you've found the right place to ask!