Hey! Thanks a bunch!
Did the game freeze when talking to the chicken or the guy, Octavia's brother (a rare, optional event!), standing close to it? I tried to replicate the bug just now, but I could still waltz right back into The Old Ultraviolet after talking to both him and the chicken. ö
As for the drummer, he'll (after you look at his drum kit) be inside the Ultra Blitz band house on the lower right of the east side map. I think the original party members might only specify that that's where he lives if you look at the drums before going down the other path and triggering the introduction to the teleporter. Both him and the next character are optional--and could conceivably be recruited out of order--but I definitely meant to make the drummer a painless pick-up; I'll improve the signposting on that part for sure.
Anyways, you're the first person to ever play and comment on any of my RPG Maker-ing--I'm sorry for sending you on a wild drummer chase, but I really appreciate you givin' my game a whirl + the kind words. Can't wait for post-jam season to kick in so I can upload the oopsie-free version! :D