No you don’t need to be a member…non member fee is £12…but you will get a £5 return voucher valid for a 7 days…in general Saturday nights seem to be the best with a general mix of guys there all night.
Only really been during the week a few times and usually it’s for an arranged meet so can comment on the best times to visit during the week…but it’s always chilled and relaxed whenever I’ve been