Aerosmith (e: Van Halen) banned brown M&Ms from their dressing room for shows and wouldn’t play if they were present. It was a sign that the venue hadn’t read the rider thoroughly and thus possibly an unsafe one (what else had they missed?)
> As lead singer David Lee Roth explained in a 2012 interview, the bowl of M&Ms was an indicator of whether the concert promoter had actually read the band's complicated contract. [1]
[1] https://www.businessinsider.com/van-halen-brown-m-ms-contrac...
(As opposed to "Van Morrison;" his middle name was Ivan and he actually went by Van)
Also found out recently “Gram” Parsons was short for Ingram.