The community center located directly behind the Cathedral of the Nativity of the Blessed Virgin Mary church in Biloxi Mississippi is a wonderful event venue.
Church community centers sometimes are fairly sparse and simple inside, but this space is easily on par with many dedicated commercial wedding and event spaces I've photographed at. I've shot several receptions here, and it's obviously very convenient to the Cathedral, with no transportation being necessary after the ceremony. It also features a large stage, which is great if a band will be providing your celebration's entertainment.
Location: 870 Howard Ave Biloxi, MS 39530.