A live bingo or keno game must be closed for play between the hours of 2 a.m. and 8 a.m. of each day. However, in the jurisdiction of a local government where a game is played, the local government may adopt an ordinance allowing play between 2 a.m. and 8 a.m.
Hours Of Play -- Restrictions
Mont. Code Ann. § 23-5-408, under Bingo, Keno, Raffles, and Heads or Tails.
Mont. Code Ann. § 23-5-408