Bev was there obviously! She enlisted whoever wanted to help set up in the later morning and then got Squall and brought him. She'll be sure to thank everyone who helped out and generally just hanging around having fun!
Nyx was the alcohol/food delivery and took a few minutes to make sure he wished Squall a happy birthday and gave him a present. But won't stay long because youths don't need adults harshing their vibe idk.