The gig-holding aspect of the Amex does appear to be somewhat underused. Dare say there are some residual LDC-imposed restrictions that the club are still bound by, but, really, these should robustly challenged and kicked into touch. There's a big Summertime marketing opportunity being missed there, with or without SASTA deigning to provide their crummy services.
Transport seems to be a problem for gigs though. If I recall correctly, instead of putting on more trains Southern bizarrely decided to shut the station for gigs. Or maybe I'm confusing this with the Beachdown thing in Stamner Park?