With rock bands, Dynamics, Fifth Fiction, Mick on Wheels and the Interchange group Hidden Wonders, the night is bound to "go off".

Interchange Wingecarribee Incorporated (IWI) is a not-for-profit organisation aimed at providing assistance to the disabled, the aged and their carers.

IWI had its first Rockability in 2009, when program manager Sharon Stewart realised "one of the main things that came out was that they wanted to go to a rock concert".

"We started out promoting young local bands and now also promote bands with people who have an intellectual or physical disability," she said.

The four bands performing on the night include a mix of local, new and established groups: Dynamics have recently formed and found their voice in a versatile mix of genres.

Fifth Fiction have a progressive/alternative rock sound, this year being their fourth Rockability.

Mick on Wheels has travelled the world singing and is expected to be the night's highlight.

Hidden Wonders formed in 2010 to give those with disabilities an opportunity to spotlight their musical talents.

Hidden Wonders have band practice every week in preparation for their second Rockability this weekend, and Ms Stewart said band members "just love it".

Apart from learning to sing and perform in front of an audience, the Hidden Wonders also learn valuable life skills.

"They're learning to sing and play the drums, but also learning to commit to something," she said. "It's getting the guys to work as a team."

This year IWI also received a community grant to help with music practice.

"We secured some funding to get some equipment like microphones and leads" Ms Stewart said.

But the community support for Hidden Wonders doesn't end there, even including singing lessons given by the Leisure Link program, to build the confidence of the performers before the Rockability show.

More than 200 people turned up to rock out at the gig last year and similar figures (if not more) are expected this year around.

Ms Stewart told of the enthusiasm not only from the performers but also of the audience.

"They get very excited; a lot of their peers go and cheer them on," she said.

"The word's getting out there and it's starting to grow.

"It's a chance to mingle and get up and dance.

"Everyone who comes has a great time."

Everyone is welcome to dance the night away and support the IWI Rockability at Mittagong RSL Club tomorrow from 5pm to 9pm.

Tickets sold at the door.

For more information please contact email sharons@iwi.org.au or call Sharon on 4862 2644.