I purchased an admission for one, valid any day on Groupon. Does that have restrictions to having access to sauna, massage and the pool. What does the purchase include? And is food included?

Food not included. You probably purchased a spa ticket which includes sauna, baths, and swimming area. The few food options are separate and the massages, pedis, manis, and scrubs are separate as well.

All saunas, baths in locker rooms and outdoor pools is included. We went once and spent the entire time in the outdoor pools. It was a blast

Food is not included, it's just for baths and swimming. Any time I go there, I don't even think about food, I just soak myself in water.