Any food cooked to a safe internal temperature of 165⁰F can be put out at room temperature and served. If you do not use chafing dishes with lids to maintain the temperature of 145⁰F to keep the food out of the temperature danger zone, then you have a limited amount of time to leave the food out. BBQ pork can be left sitting out at room temperature, covered, for no longer than 4 hours. After 4 hours the food will need to be refrigerated or reheated. If you choose to reheat the food, you must reheat it to 165⁰F and at this point you could leave it at room temperature for an additional 2 hours, afterwards the food must be discarded. The rule is you can only reheat food once and then any leftovers must be discarded.