It's true that I can think of a few bands that I have only played once and never returned. Super Furry Animals, Levellers, Status Quo, Stereophonics, Catatonia, Space, Morrissey and many more I've probably forgotten! So maybe it's true the acoustics are a bit crap - and the crowd too impassive. I remember the Manics slating the crowd last time they were down, so suprised that they came back!! I also notice in Llandudno (compared to arenas like Manchester and Liverpool where I often go) much less people watch the support bands. It's really odd.
For Ocean Colour Scene recently for example the room was dead when poor Mike Peters was on. I think Llandudno struggles with the live music culture, people seem more interested in wanting to get p****d up first.
There is a massive punk scene around at the moment - if VC management got wise and booked some of these bands, I guarantee they would seel out fast -bands like Less than Jake, Reel Big Fish, Dropkick Murphys, NOFX, Good Charlotte, Whitmore, Zebrahead etc have all sold out similiar sized venues in Liverpool and Manchester recently.