Bill Gibson of clients Huey Lewis & The News once told me that when the band travels, people often recognize Huey, but they don't recognize anyone else in the group.
As a result, Bill has often been on an airplane seated next to people talking about Huey and not realizing that the band's drummer is right next to them.
Bands and businesses often do not know what to talk about on social media. But most likely they are surrounded by interesting people, information, and stories. They just need to get better at looking around.