My advice would be, don’t go in with expectations. You dont know what will happen when you are there.
You are going there to have a shower, and relax in a steam room or jacuzzi, anything else will be a bonus. Explore the building, there are 3 floors of things to see.
People will try and sneak looks at your cock. Weirdly they do it more when you are undressing, not in the shower when you are naked. I had my first time almost a week ago now and I enjoyed it, will be back eventually.