A Christmas Cactus — Theater opening. 7:30 p.m. The 73rd Avenue Theater Company, 7287 Lowell Blvd., Westminster, 720-276-6936, through Jan. 3.
CU Buffs’ Biggest Tailgate Party — Live broadcast of the game on a 14-foot screen. 10:30 a.m. Millennium Harvest House, 1345 28th St., Boulder, 303-443-3850.
Get-out-of-the-House Day and Avoid Leftovers — Happy Hour with wine deals and tapas. 3-6 p.m. The Blending Cellar, 946 Pearl St., Boulder, 303-447-0475.
The Nutcracker — With the Boulder Ballet and the Boulder Philharmonic. 4 p.m. Macky Auditorium, CU campus, Boulder, 303-449-1343.
PsychicSpeak Talk: Gratitude — With Heidi Petersen. The Bead Lounge, 320 Main St., Longmont, 303-545-5562.
Salsa Dancing. 10:30 p.m. Trattoria on%u2008Pearl, 1430 Pearl St., Boulder, 303-544-0008. %u2008