The group is returning for its fourth year and all funds raised from the event will go to a women's refuge in Port Macquarie.

A Kendall Music Exchange spokesperson said the program may make people 'whimsical, nostalgic, inspired, furious, embarrassed and completely at a loss, possibly all in the same song'.

"The blokes pick and choose songs from any genre that takes their fancy, sometimes singing them in their original form but more often than not they are arranged," she said.

"If you enjoy arcapella singing in the base clef, have a secret thing for beards or simply revel in the spectacle of a bunch of blokes all trying to march with the same foot first, then you should come along."

The spokesperson said it's set to be a fabulous night of music, friendship and laughter.

"Brave musicians are welcome to strut their stuff during the open mic performance," she said.

On Friday, August 2 doors open at 6.30pm for a 7pm start. Entry is by donation.