In reply to laura.caley:
Plenty of instructors will work weekdays, but might not run a course due to low demand, this could either make it cheaper as they will be keen for the extra work. Or more expensive as it's one-on-one (try and split with a friend if you can).
If you're a competent lead belayer, someone on here might meet up with you for an easy trad day and show you a few bits, but try not to pick up their bad habits (we've all got them)...
If you're happy to get started, get a few nuts and cams and wander around popular crags placing gear at ground level. There'll generally be a few people around weekdays and some of them might let you second. Or check out your gear placements in their lunch breaks. Most peak grit crags have some bouldering, so take a pad and you can get some climbing done even if no-one will talk to you. But I'd say we're generally a sociable, helpful bunch when we're not behind our keyboards...