MUSIC: Tristan Allen @ Caffe Lena, Saratoga Springs. The Caffe’s Emerging Artist Breakout series welcomes back the experimental pianist, composer and former open mic regular, who released his debut album with producer Amanda Palmer of Dresden Dolls. 7pm. $5.
THEATER: “A Christmas Carol” @ Space 360, Hudson. It’s opening night for Walking the Dog Theater’s production of the Dickens holiday classic, performed by David Anderson and directed by Ted Pugh. 8pm. $20; students $12. Through Saturday (December 24).