Revered guitarist Steve Vai, bassist Billy Sheehan and drummer Gregg Bissonette were about to regroup for the first time in nearly 30 years for a one-night-only charity show in a Hollywood bowling alley, when city officials decided the venue was too busy.

As a result they shut the free show at Lucky Strike Live Hollywood/Highland down.

"The fire department shut down the whole show before we got on stage," Sheehan told fans, "and did we ever have a surprise for you! Such is life. Place was so crowded and the line continued down to Hollywood Boulevard all night. Just too many people."

Van Halen star Lee Roth was not expected at the gig, but he showed up to cheer on his former bandmates, who were set to be joined by Steel Panther star Michael Starr on vocals.

Starr posted a picture of himself with Roth on Twitter.com before the concert was scrapped, and wrote, "Look who showed up for the reunion. Guess I'm singing back ups."