I know you can visit some theme parks at certain times of year to avoid many children, however what I mean are theme parks built more for imaginative and fun-loving adults.
Take some of the park rides you might find in family theme parks that appeal to both adults and children, but instead of avoiding elements that may confuse/frighten children, they’re allowed to get more detailed or whatever may be more fun for people. Fwiw I’m aware of some smaller scale themed venues (particularly some horror-related ones), but I feel like I’m blanking on any obvious larger scale ones.
I’m so glad I’m not the only person that gets the same “theme park” vibes from MMOs. It really takes me out of it when someone is doing the same quest as me but is a few steps ahead so they trigger a unique animation or dialogue from the quest giver, and then I experience the same animation or dialogue a few minutes later. Kinda like waiting in line for a ride but you can hear or see some parts of the ride as you progress through the line.