Bring the gig coordinates with the band, venues and all other necessary parties to reserve a date and calculate the total cost of a show. This becomes the goal that will be reached for the show to happen.
You, the fans, purchase advance tickets and spread the word to raise the money needed. When the goal is reached the gig is guaranteed and Box Office tickets go on sale to the general public.
Each Box Office ticket sold earns you your money back, up to attending the show for free. So, spread the word and reap the rewards of seeing your favorite bands for much less.