Maybe I'm wrong, but if I remember correctly even the biggest conferences like Nashville in 24 didn't even have any merchants accepting bitcoin. I remember people being pissed off about it. Would love to be proven wrong and would love to see it. But you would also need to find a place with high enough density of merchants and producers willing to accept sats and also enough musicians and technicians to put on a festival and do all the zapping V4V stuff properly. It will happen at some point though, no doubt