That's exactly how the guy in the Fish bar described them!
You generally have a feel for the night depending upon who is hanging around outside of the kebab shop; Shirts, beer bellies and east 17 haircuts - MMA. Short skirts, long coats, heels - some sort of random club night although the girls seem to wear this to MMA too. Hoodies, painfully tight jeans, Dr.Marten's, backpacks - concert. Then you have the odd wedding or presentation.
The concert goers generally seem to take the train so I can see them as I walk past Limehouse station which is handy as I can call the kebab shop to be ready for when I get there. The MMA fans all drive SUVs or BMWs and mostly come in from essex.
Friday night events get a little tetchy sometimes when you throw the random groups of drunk asian lads into the mix but it is mostly harmless otherwise.