I write mysteries but they include romantic elements. Because of this I joined Romance Writers of America as well as Mystery Writers of America.
I also have two published paranormal/urban fantasy mysteries published by small presses. With this new direction I recently attended the science fiction/fantasy Mile Hi Con in Denver. This introduced me to a new world of people in interesting costumes and a wide variety of writers and artists.
Like cooking, writing can blend a variety of genres. It leads to a delicious meal.