Ask friends... 
I think it would pretty hard to find someone that doesn't have a friend that is into Star Trek at some level (even if they are in the closet about their "Trekiness").
But yes, this category does lend itself to those that share this interest. There are many categories like that though. I couldn't find a medieval fair or hot air balloon festival without doing some research.
Not everyone enjoys Star Trek, and that is absolutely fine. There aren't any specific locations around me that I can think of off the top of my head, but the three so far have all shown me something I was happy to learn more about. Especially the two "landscapes" from filming... that was really cool. And even though they could be in the "Movie Locations" category, I would have never looked there.
BQ