They're just smoking pot in the walk in.
Goggle says that location closes at 10pm
The best I can tell you is call the manager at that locale and talk to them. Let them know what's up. Good luck.
Gee I don't know. Denver is a little strange for being an alleged modern big city. Everything closes at 12 midnight. That particular Burger King on 26th and Sheridan has been my go to option to get something warm to eat after landing at the airport and rushing around getting booked in the room and so forth. I know they stay open late but I can't say for sure if they stay open after midnight.
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