Comment Only half the problem (Score 2) 18
They demand exclusivity with venues.
Which means you either hand over all your booking and ticket sales (for a fee, of course) to them, or not be able to book any Ticketmaster artists. If you haven't considered the question, you may not recognize that artist-choice and ticketing are two of the biggest levers a club owner has to manage their business. Most of the other costs of business are pretty inflexible - about your only other cost-control options are fucking over your workers and watering the beer.
This does a couple things - clubs become more like farmers - they get to soak up all the risk with none of the control. It also gives TM more control over artists - I've seen less info on how TM squeezes them, but don't think that isn't there. If an artist doesn't like their terms, they don't get to play their venues.
And of course they wet their beak at every single touch point along the way.