IT MAY be in their name, but it's rare to see females playing onstage at a Round Mountain Girls gig.

That's exactly what will happen next Saturday at South Tweed Sports Club, when they perform alongside Gold Coast group Quatro.

Drummer Rex Carter said the Round Mountain Girls first performed with Quatro at Bond University some time ago.

"That was where we first met them," Carter said.

A big deal in their own right, Carter said Quatro liked to get up and really "belt out" their songs.

Carter said the two groups would alternate between sets, before getting on stage together.

He said having strings - and females, for that matter - on stage with them was a rare delight.

"It's something we hope to do a lot more of," he said.

He said there was still a bit of a mystery surrounding the name of the Round Mountain Girls, considering the not-so-subtle lack of actual girls in their band.

"If you ask anyone in the band, they'd have a different story," he said.

"I always say I had nothing to do with it. I think they were all drunk at the time.

"But if you called them the Round Mountain Old Guys, no one would ever come."

On Thursday afternoon, the band performed their first of five sets at the Tamworth Country Music Festival.

He said Saturday's gig would be "a party".

"We're looking forward to that show," he said.

The gig

Round Mountain Girls & Quatro

South Tweed Sports Club, Minjungbal Dr

Saturday January 31, 8pm

This is a free gig.