No idea if women like fantasy with female leads more than men do, and no idea if that’s the reason (?) you seem to be reading a lot of it despite not wanting to. I’m a man and “fantasy with female leads” sounds perfectly fine to me. Either way, it seems to be easily avoidable? However you discover a book, you can look at the tags, the cover and the description, and if it seems like something you don’t enjoy you can decide not to start reading it.
Sci-Fi is a tag you can search for. You can also ask for specific stuff in the Seeking Recommendations thread.
Almost none of the book clubs are oriented around romance and I’m not sure there are even any around ero. I don’t know what “heterosexual dude book club” means and what books would be read there.
Just go to the clubs whose concept (medium/genre) sounds interesting to you, vote for the books you want to win, and read with the club if a book you like wins?
Apart from the Natively book clubs you might also enjoy the Wanikani book clubs. They are usually oriented around difficulty level, so a wide variety of manga/books are read. (Natively book clubs seem to be oriented around medium/genre.)
Also feel free to start your own book club! E.g. you enjoy sci-fi? Make a sci-fi book club!
