St. Laurent is playing Napa Bowl? Wait, what year is this?

A full decade after the hard-rocking band named for bassist Bob St. Laurent roared out its last encore, the group is back with a new CD and a pair of Bay Area gigs this week, including a Saturday night show at the Napa Bowl Lounge.

“We never really broke out,” St. Laurent said of the 1980s, when his band sold out San Francisco clubs like the now-revered Mabuhay Gardens.

Ten years ago, the four musicians went their separate ways, pursuing careers from law (drummer and attorney Danny Cantrell of Benicia) to agriculture (guitarist and vineyard manager James “Thor” Regan of Napa).

Last year, St. Laurent — who divides his time between Napa and Maui — bumped into Cantrell, and the two soon organized a reunion with Regan and singer Mark Tate, now a real estate agent in Napa.

“Within three months we were opening for Journey and Def Leppard,” St. Laurent said. “And just like that, we’re right back where we were and climbing higher.”

Sponsored by Full Sail Ale, W Hotel and several equipment manufacturers, the band plays San Francisco’s W Hotel on Thursday and the Napa Bowl Lounge on Saturday from 9 p.m. until midnight.

“Expect an outdoor partying coliseum act jammed into a little room at the bowling alley,” St. Laurent said. “It’s just gonna be too much fun.”

Everybody’s mellowed

To St. Laurent, “partying” is not about getting loaded onstage or trashing hotel rooms. “Happy partying, not destructive partying — I haven’t had a drink in 10 years,” he said. “Everybody’s mellowed out.”

Today, the band seldom plays clubs; but after answering a Craigslist ad last year, St. Laurent is now the official rock band of the NorCal Roller Girls, an amateur roller-derby league based in Chico.

“Our first time we played for 800 people and said ‘OK, we’ve found our new home,’” St. Laurent said. “This is way better — there are families, it’s a much cleaner, happier scene.”

The band is also preparing to book the summer touring season, with plans already in place to perform at Shoreline Amphitheatre (one of several arenas where Bob St. Laurent works as a “production runner,” or temporary personal assistant for headlining musicians — “I walk Sheryl Crow’s dog,” he said), Concord Pavilion and Marysville Amphitheatre.

St. Laurent has a new, five-song CD of originals, principally written by Regan, that hint at the band’s explosive live energy. Crisply and professionally recorded, the disc doubles as a demo designed to attract major-label interest and a stopgap for fans clamoring to hear more. The disc is available from the band at gigs or www.stlaurentband.com.

“It’s just good time rock and roll,” said Bob St. Laurent.