I've only done one other escape room, and I really think the fun is in the people you bring with you in your party to attempt the escape. The theme "Rescue" was the one I did with a group of very bright 30ish year-olds.
Before moving to the room, the attendant went over the necessary information that we needed, we signed the waivers, and then moved to the room.
This was truly great fun finding all of the clues and rescuing the girl! This room has an escape rating of 10%, so we were lucky to have escaped!
I'm not sure if the actual theme is that important, but since I'm not an expert at these, maybe it does matter. The room itself was very well designed and a ton of fun. You will definitely have a grand time even if you don't escape the room.