Events happening Friday

STAGE

A Christmas Carol This all-new musical production of the enduring holiday classic, adapted and directed by Christina Harris, will feature traditional song and dance — and some unexpected musical flourishes as well, all in the service of Charles Dickens’ heartwarming 1843 fable. Sierra Madre Playhouse, 87 W. Sierra Madre Blvd., Sierra Madre. 8 p.m. Fridays and Saturdays, Nov. 26-Dec. 18; 2:30 p.m. Sundays, Nov. 28-Dec. 19; 2:30 and 7 p.m. Dec. 12 and 19; 8 p.m. Dec. 21-23. $23. (626) 355-4318. https://www.sierramadreplayhouse.org.

EVENTS

Loscon The Los Angeles Science Fantasy Society Convention, as it’s known to outsiders, is putting its focus this year on urban fantasy, steampunk, sci-fi noir and, in general, the darker side of science fiction. There’s a dizzying amount of events planned, including appearances by Emma Bull, author of “War for the Oaks,” a pioneering work of urban fantasy. Also on hand: local young adult author Cecil Castellucci, who has lent her youthful zest to a series of books with DC Comics’ imprint Minx. LAX Marriot, 5855 W. Century Blvd. Through Sunday. $25-$35 a day; $50 for the weekend. https://www.Loscon37.org.

POP MUSIC

Weezer It seems that Rivers Cuomo and Co. have been feeling nostalgic lately. Earlier this month, they released “Death to False Metal,” a collection of previously unreleased songs (including some from the early days), and reissued “Pinkerton,” their 1996 flop-turned-fan favorite. This weekend kicks off their “Memories” tour, on which they’ll play their self-titled debut album in full one night and “Pinkerton” the next. And have no fear — the band will perform other material as well. Gibson Amphitheatre, 100 Universal City Plaza, Universal City. 8:15 p.m. Friday and Saturday. $27.50-$106.25. (818) 622-4440. https://www.livenation.com.

FAMILY

The Science of Gingerbread It’s not just tasty and seasonally apropos — gingerbread is also a bastion of science. Indulge your sweet tooth and learn about the chemistry and physics of baking. Discovery Science Center, 2500 N. Main St., Santa Ana. 10 a.m.-5 p.m. Monday through Saturday, 11 a.m.-5 p.m. Sunday. Friday through Jan. 22. $9.95-$12.95. https://www.discoverycube.org.