The sports and entertainment industries gets more attention to themselves unlike other industries. I believe also that they have or share fans that are into blockchain as well. If these two industries looks into blockchain I believe there would be a strong massive adoption as a result of their total engagement with their fans if they constantly accept Bitcoin payment for their shows and events.
That's a good thought of an idea but surprisingly we have alot of industries already into the adoption of the blockchain technology right now while some are still coming in, they got a number of deals to sign MoU with their representing companies or organizations to implement this and i think accepting bitcoin as a payment currency is already in place to an extent, though may not have gone widespread, some were even showing the bitcoin advertisement in their live matches and spectators uses the option of bitcoin to serve as payment in specific locations where acceptable, but knkw that this does not got limited to the sport and entertainment industry alone, other industries where involved as well such as medical, tech, education and even political professions all uses the decentralized network of blockchain in one way or the other together with bitcoin.