@Caroline2885 If you fly the Pride flag, then you are proud of who you are, and comfortable with who you are, as you should be.
If the guests left because of that, then it's their problem. Offering a refund because of what you suspect is the source of the problem, is the antithesis of Pride. Why would you compromise yourself/selves in that way for a review?
I had political signs up for the 2020 election cycle, and will again this year. I simply included the signs in the pics in my listing, right there for every potential guest to see. If they missed it, that's on them.
Be who you are, love yourself, and let others who feel differently live their own small judgmental lives.