[Organizers] Liability insurance

I am wondering whether most dance series have liability insurance - particularly small ones. Insurance for a dance series from CDSS costs $450, $550, … depending on the number of dances plus $85 membership fee every year. I suspect other sources would be more expensive. For a small dance with few financial reserves, the extra fees each year could easily drive it to extinction. I know that sone venues require that the group has insurance, but not all do. What is the risk of not having it? Any recent incidents in the past few years? I’d think possible suits could be from dancers or musicians/callers who got injured or thought they were treated badly, venues where there was damage to the site. What about ASCAP copy infringement suits? Have there been any of these? Anything else? John