Nightlife

The ABGB's Hell Yes Holiday Parade. The ABGB is hosting a bike ride to the Trail of Lights in Zilker Park and back. Wear your best holiday outfit, decorate and light up your bike, and go on a free ride with the Ghisallo Cycling Initiative. Once you return to the South Austin brewpub, there will be a costume contest with categories for best, funniest and and most festive. 5:30 p.m. doors Dec. 18. Free. 1305 W. Oltorf St. theabgb.com/event/hell-yes-holiday-parade-12-18/.

Science

Astronomy on Tap. In the final installment of the year, three University of Texas professors will take you on a trip to the most incredible places in the universe, exploring the history of our home galaxy, how stars form and more. Astronomy on Tap also will have telescopes on hand so you can look for exciting objects in the night sky, weather permitting. The evening also features astronomy news and trivia and new Astronomy on Tap merchandise. 7:30 to 10 p.m. Dec. 18. Free. The North Door, 502 Brushy St. astronomyontap.org/2018/11/astronomy-on-tap-atx-51-december-18-2018.

Coming up

"A Tuna Christmas." It’s Christmas Eve in the Lone Star State. Radio station personalities Thurston Wheelis and Arles Struvie report local news on the yuletide activities that have gripped their little whistle-stop of Tuna, the third smallest town in Texas. What’s to be done about a disastrous Christmas Carol pageant, a sabotaged yard-decorating contest and a mysterious phantom on the loose and spreading havoc? Opens Dec. 20. 8 p.m. Thursday-Saturday, 3 p.m. Sunday, through Jan. 5. $10-$25. Trinity Street Playhouse, 901 Trinity St. 512-524-2870, citytheatreaustin.org.

House Beer Release: Moebius at Black Star Co-op. Black Star is welcoming back its beloved whiskey barrel-aged Russian Collusion Imperial Stout after a two-year hiatus. This rendition is big, boozy and jammed full of roasted chocolate and coffee flavors that are complemented by oaky vanilla goodness from Colorado whiskey barrels. A couple of variants, including Bananas Foster, are on the way as well. 11 a.m. Dec. 20. 7020 Easy Wind Dr. facebook.com/events/318772445385185/.

Eddie B.’s Teachers Only Comedy Tour at Bass Concert Hall. Teaching is a stressful job. I know I put teachers through the wringer as a student myself. So, it’s no surprise that teachers need a creative outlet so they don’t go bonkers. Enter Eddie B. The Houston native and the creator of the video series “What Teachers Really Say” will be headlining with a cast of educators that will tickle your funny bone while taking you to school. No hall pass required. 8 p.m. Dec. 22. $35-$65. 2350 Robert Dedman Dr. texasperformingarts.org. — Brently Heilbron