Chautauqua Community House

It's a 1918 Craftsman building known as Chautauqua's living room, sitting at the base of the Flatirons in Boulder inside the Chautauqua National Historic Landmark, so expect a historic, intimate feel rather than a big blank ballroom. Reviews (4.8 avg, 113 total) are mostly about general park visits and shows, not weddings. One note from the Community House FAQ, which is written for its concerts and talks: professional cameras with removable lenses are NOT allowed inside at those, phone cameras only. Parking is limited in high season and the whole campus is smoke-free. Their brochure puts the main Grand Assembly Hall at 80 seated banquet-style, 100 theater-style and 124 max, and the weddings page says all catering is arranged through Chautauqua's own hospitality team, with multiple rooms in the house for the ceremony, reception, cocktail hour and getting ready. Guests can stay steps away in the campus cottages and lodges.