[Organizers] Window curtains that might help w/ acoustics

I am hoping some of you will have suggestions and recommendations for me. (including where else to send this query) Note that I'm also trying to figure out how to sign up for the Trad Sound SharedWeight list. My question: Where would you buy decent quality fire resistant window curtains to dampen sound and improve acoustics? (What vendors do you recommend?) Back story: Our first Friday dance series moved to a new venue when we started up again in November 2022. The hall is visually appealing, with a high ceiling made of tin, large windows on three sides of the hall, gorgeous hardwood floor, and incredibly welcoming venue owners. But it has VERY "live" acoustics, which are really challenging. The venue owners removed the curtains when they got their windows replaced. For several months, they've been looking for fire resistant window curtains for the large windows on all sides of the hall. We'd love for those curtains to also be really good at dampening sound (thus improving acoustics.) My internet searches are inconclusive so far. I'd love to have some suggestions for reputable sources that will serve our needs, offer a well-made window curtain product that's functional and aesthetically pleasing. Thanks for any suggestions or advice! Cheers, Chrissy Belfast Flying Shoes Belfast ME ** ** ** Dance Calling | Transcription | Belfast Flying Shoes chrissyfowler.com<http://www.chrissyfowler.com> | westbranchwords.com<http://www.westbranchwords.com> | belfastflyingshoes.org/blog<http://www.belfastflyingshoes.org/blog> <http://www.chrissyfowler.com> (207) 338-0979