We are interested in using these for an exercise room near a pool, so swimmers will be coming in and out to drop off equipment. We love that these will help avoid slipping. Do they dry quickly (we worry about mold growing from damp, dark areas)?

Our 3/8" Sport-Lock Rubber Tiles do dry fairly quickly as long as there is good ventilation. Our rubber flooring is mold and mildew resistant, so that wouldn't be a concern unless there were some food or other organic matter on or under the tiles. Water may get under the tiles, so if that were to happen, we would recommend pulling the tiles up periodically and drying them under the surface.