The Official Mayan Warrior Afterparty for San Francisco The Official Mayan Warrior Afterparty for San Francisco. The Great Northern Saturday, April 25th 10PM - 2AM Ages 21+ The night does not end early after our sold-out art car event at Gold Bar Distillery. We continue the dancing at The Great Northern, deep into the night featuring special guests from 10PM - 2AM. Tickets only available while supplies last.