Hold on, I re-read and I think I misunderstood the timeline.
You invited him and his GF to a show without discussing with him first or checking with the venue about support for disability.
I'm assuming they didn't respond and you didn't buy the tickets.
You had an evening out for drinks arranged for you and him which was after the show finished, which he then cancelled because he was sulking that you didn't check with him/GF/the venue.
Is that right? (I thought on first reading that he'd cancelled the drinks and THEN you'd asked them to the show as a sort of make-up attempt.)
Unless you have a history of neglecting to take into account their support needs**, then he's being a stroppy arse and I'd kick him to the kerb.
**I can say it gets very wearing to be invited to events/places that are (for example) unsuitable for wheelchair users, or don't provide any sign language performances, or any seating, or anywhere to take a child having a panic attack, or provide any food options for someone with allergies, etc. The first couple of times I'll say "Oh that sounds lovely but unfortunately I won't be able to as XYZ, but maybe you and I could go for a coffee/lunch next weekend?" After that I'm just like 🤨