In reply to Lupine Lacuna:
As Eric mentions, we did try this unsuccessfully for a 6 month period. Lots of people asked us to open early but then never supported the idea when it came to the crunch. The cost of opening a climbing centre for one or two individuals (and often none) is unfortunately prohibitive for us, not to mention the obvious disruption to staff's personal life.
London is a vey different city to Bristol, we did give it a good go but it proved unviable as an option for us.
As Eric also mentions, we are a very approachable bunch and we are happy to discuss the merits of ideas and suggestions face to face, via the Guestbook and Noticeboard on our website or indeed on our Facebook page.