I was at Vanilla Alternative last night and going to JayDees tonight. Both are great clubs but different in style. You don't need membership for either but you must book in advance as single guy numbers are very limited. Both clubs are family run. Very nice hosts and visitors, with good fun to be had at both.
My favourite club is JayDee's, a very friendly and welcoming place. But single guys need to book in advance on a Saturday night, but they are also open some Friday's for their Plenty of Gents night.