...And, as far as I know... the WNBR is a free event. No entry fee. :-) Just show up and ride... "As Bare As You Dare". :D There are a variety of cities across the U.S. which support this event. ... Some are on different days and/or different times of the day. Check the WNBR groups on TN for more comments.
I'd love to do the WNBR sometime!
B2B is a really fun event... and last year, I didn't see any "drunken public pissing" or anything like that. The police were very vigilant about the zero tolerance policy for alcohol. It was my first visit to San Francisco, and I found it to be a very clean, beautiful, charming city. I can't wait to go back!