I've got the gym and a pool bar. Thanks for the heads up on the firepits. I probably would have tossed one in just out of habit. They tend to show up on most of my properties. Especially since I've learned that you don't have to place all the chairs. Extra chairs will mysteriously appear as needed, the way things do in the Sims.
Based on the availability of blueprints, I assumed a bar, "party area" and wedding/chapel area are benefits as well. Of course, this is only relevant if I want to play as the resort owner. If I am simply going to place it and let my Sims vacation there, the details are less relevant. As long as they can check in and find a bed to sleep in. Although, since Michaela and Laz are both alien, they don't even need to sleep.
But, now that it is almost done, I do think Michaela and Laz will be having their wedding there. So, the chapel area will probably get some decent attention.