Roughly how many MJ venues / areas / franchises are there in the UK?
Just wondering if several polls in a similar format to the recent DJ you enjoy threads would work. If it was alphabetical you could scan it quickly. People could re-vote to reflect changes in venues or if they decided they wanted more privacy etc.
If there's literally thousands of venues, then by area might work - pm the person for more information. Still gives a certain degree of privacy. There's a big difference between
"I go to Ceroc Kent"
and
"I go to Bromley"
although neither are currently true
Maybe use
CEROC - Links