I don't know what part of the Metroplex you are in, but we just threw a birthday party at our church, and it worked out perfectly. It was at First Jefferson Unitarian Universalist Church - their website is fjuuc.com. We used Coleman Hall, which is a big open room with tables and chairs you can set up however you want. We also rented the kitchen, which is huge, and has everything you can want. You can opt to clean up yourself, or pay for custodial service when you're done. There is a park right next door, and we set up a volleyball net outside. It's in east Fort Worth, if that's convenient for you.