AITAH if I don’t show up to something u agreed to?

Okay so I joined this class thing were a certain amount of people are needed keeping I vague lol. Anyway it’s the night before and there are 4 classes in different locations very different locations like hours apart and still no update on which one I’m in or if I’m in any I messaged one of the people and got back a random message I’m fairly certain he’d been drinking but I think he was saying I’ll send details later or someone else will? Anyway it’s now half 8 and nothing if I get no details or updates tonight I’m just not gonna show up or ask any follow ups because I can’t be asked. So AITAH if I do this?