Quite a few, but sexual orientation is not something that really concerns me too much when making friends so it never occurred to me to categorize / label / count them xD
I Live in San Francisco, so it's a totally normal thin here. Not sure how many total I have cause it's not something I keep track of. Being bi myself, I've been to some LGBTQ gatherings and I try to make new friends as often as I can
My sister (and sis-in-law) are lesbian, and I also have 2 male gay friends (who are also a couple), my GF is bi-sexual, and one of my friends is trans-lesbian. This is on top of having many friends who are straight. I love them all as their good peoples!