I think penny and her friends they like William. Maybe because they are in the same age? They tried to help him to do his interview for the band, but Freddie the doorman was so strict about the guest list. I think he can help William to do his interview even if his name not in the list but he was so rude with William.
Also Stillwater they didn't like William when he talked with them in the beginning, but when he mentioned something about their style in the music they like that.