For a symphony orchestra’s formal fundraising gala, “Anything But Classical” is an unexpected theme — but it’s the theme nonetheless of a Friday event benefiting the Cambridge Symphony Orchestra, the 70-person community orchestra founded in 1975.

There will be two groups of musicians playing: a one-man band, and a guitar and bass duo, said Natalie Shelton, a percussionist and member of the orchestra’s fundraising committee.

“While I don’t know exactly what they’ll be playing, they know that the rules are ‘anything but classical,’ so there will likely be some jazz tunes, some funk, some blues, folk and so on,” Shelton said Saturday night.

This second annual benefit music gala retains all the swanky trappings, though: it’s 18-plus, the dress code calls for cocktail attire and the $75 entry buys gourmet food and drinks, a silent auction, raffle — among the prizes are tickets to the ballet, theater and Red Sox games; gift certificates to restaurants, a dozen cupcakes; and more — and, of course, live music. All proceeds help support the continued success of the orchestra, Shelton said.

The event is to be held in the Alumnae Lounge of the Aidekman Arts Center at Tufts University, 40 Talbot Ave., Somerville.

For information on whether there are RSVP tickets available, visit the orchestra’s website.

This post was written from a press release.