For the ninth straight year Santa’s Big Red Sack is returning to the Avenue Theater once again skewering all the things we hold dear in the sketch comedy billed as “The holiday show you shouldn’t take your kids to.” It’s clever, witty, raunchy and relentless, and definitely not for the easily offended. December 1 – 24, Thurs/Fri/Sat @ 7:30 p.m.; Sundays @ 4 p.m. $27.50 – 303-321-5925 avenuetheater.com – Avenue Theater, 417 E. 17th Ave., Denver 80203 – For mature audiences.