In a world where major motion pictures stream across 2-inch cellphone screens, it’s a nice surprise to hear the Bay Area’s only two remaining drive-in movie theaters are booming.

So much so, Solano Drive-In in Concord and Capitol Drive-In in San Jose — both operated by West Wind — are hosting a customer appreciation night Thursday, Aug. 25, featuring “Ghostbusters,” “Angry Birds,” “CIA” and “Tarzan.” Gates open at 6 p.m., and movies will start at dusk. In addition to the free films, there will be live music, bounce houses for the kids and other activities.

The idea is to “thank our loyal customers, and invite those who have not yet experienced the drive-in to give it a try,” says West Wind’s Nancy Crane.

Despite struggles for brick-and-mortar movie houses because of increasing choices for home entertainment, the West Wind drive-ins have experienced record box-office sales for the past 10 years, Crane reports — an anomaly attributed mainly to lower ticket and food prices, plus double features.

“We are thrilled people are rediscovering the family fun of the drive-in,” Crane says. “Parents bring their kids to watch the first movie then the kids fall asleep in the back seat while the parents watch the second movie. It’s the perfect baby sitter.”

Solano Drive-In is at 1611 Solano Way, Concord. Capitol Drive-In is at 3630 Hillcap Ave., San Jose.

Contact Angela Hill at ahill@bayareanewsgroup.com, or follow her on Twitter @GiveEmHill.