Friday

Hey, it's  Christmas in July (OK, maybe more like June, but it's still hot). Mark the record by lacing up your skates and doing a few laps in a T-shirt and shorts at the Blue Cross Riverrink. It's at 101 S. Columbus Blvd. Time: 1 to 8:30 p.m. Tickets: $3; skate rental $10. Information: 215-925-7465.

Saturday-Sunday

You may know how the songs, but do you know how they came to be Christmas classics? In Behind the Music: Holiday Tunes, stage vets Sonny Leo and April Woodall do some singing and some talking about the season's sounds. The show goes on at Act II Playhouse, 56 E. Butler Ave., Ambler. Times: 5 and 8 p.m. Saturday, 2 and 8 p.m. Sunday. Tickets: $29 to $41. Information: 215-654-0200.

Sunday

Keep that holiday spirit going just a bit longer with the Winter Beer Festival at World Cafe Live. Among the brewers represented, may we recommend some of our favorites: Starr Hill from Virginia; Saranac from Utica, N.Y.; Lagunitas from Petaluma, Calif.; Belgium's Brouwerij Bosteels; North Carolina's Duck Rabbit; and Philly's own Yards. Enjoy your brew with some music by the Whiskeyhickon Boys. World Cafe Live is located at 3025 Walnut St. Time: Noon to 4 p.m. Tickets: $45; $20 designated drivers. Information: 215-222-1400.

There's no debate. Casablanca is the best movie ever made, and best seen on the big screen. The 1942 Bogart-Bergman wartime romance screens at the Colonial Theatre, 227 Bridge St., Phoenixville. Time: 2 p.m. Tickets: $9; $7 seniors and students. Information: 610-917-1228.

He may have been born in the Bronx as Ted Horowitz, but the blues guitarist and singer better known by the stage name Popa Chubby has the Mississippi Delta in his blood. He plays at the Sellersville Theater, 24 W. Temple Ave., Sellersville. Time: 7:30 p.m. Tickets: $21.50 and $29.50. Information: 215-257-5808.