aren't low ticket sales the venue's issue?
Don't the bands (in venues the size of 930 and up) typically agree on with the venue on what they will get paid?
then the venue figures out the price based on that..and the assumption it will fill 80% of the venue and make a profit on drinks (and 20% of the merch)
I guess there could be a clause in the contract that if they don't sell 50% of the tickets by X date...the show gets canceled?
but I only play a booking agent on TV, I'm not one in real life