@Susan Wilhite since sexuality is a protected class (cant limit sale to sexuality or race or...) You're kinda treading on thin ice. I would recommend chatting up local businesses in the area of the house to see if you can put a flyer up. If some of them are LGBTQ friendly (certain restaurants have weekly Drag Queen bingo, for instance), so be it. But i wouldn't limit marketing to those neighborhood businesses, i would hit up every business in the area.
I know a guy who markets his mortgage company to the local ultimate frisbee community, and understand thats a significant portion of his business. How does he market to them? He is a keystones of the community and plays in leagues and on club teams (and just won a world championship)! He hosts tournaments and donates to youth programs and gives away frisbees/coozies that say he is the area's "Ultimate Lender".
If you're going to target marketing to runners or cosplayers or LGBTQ, you should go be part of their community, and give as much as you take. Otherwise, just market to all the area locals and see what hits.