In reply to Juhnu85:
There isn't really anywhere for an evening hit unless you are willing to drive a fair way.
Heading North, these are probably your best options:
If you are really keen, you could make it to Forest Rock, Windmill Hill and Cademan Woods in about 1hr40. Forest Rock is good for hard bouldering but there isn't a lot that is worthwhile below 7A. The other two are fairly minor venues.
Most of the bridges that people climb on are rubbish and not worth climbing on, Slawston bridge might actually be worth a trip and is about 1hr15 away.
Your next closest are probably Pleasley Vale Anston Stones and Roche Abbey which are probably just under 2 hours. They are all good but access at Anston and Roche Abbey is sensitive so read the access advice and be on your best behaviour.
Or you could head South to the Southern sandstone. You might get there in an hour and a half but it might take a lot longer if the traffic isn't on your side.