I think its normally every fortnight on sunday evenings down at southsea in the carpark by the arcades (the big carpark which faces out to the arcades and the hovercraft port). There tends to be a meet on portsdown hill first, then a convey through cosham to the seafront. roughly starts from 6.30/7 onwards.
I think they had their meet yesterday, but ill find out from the bloke that runs it.