NBA teams that do not comply with league rules designed to minimize the spread of the coronavirus this season could face major penalties such as forfeiting games or draft picks, the league told its franchises Saturday. The league also said that it and the National Basketball Players Association will discuss players, coaches and other staff “being required to receive a coronavirus vaccine” when it becomes available, strongly urged teams to encourage players and personnel to get flu shots, and said that effective immediately Tier 1 and Tier 2 personnel — which basically means players, coaches and some essential staff — must avoid bars, lounges, clubs even if food is served, most live entertainment or gaming venues, public gyms, spas and pool areas. Also off-limits: indoor gatherings of 15 or more people.