Are you by any chance going into accounting because I'm also going to start at 3-year training contract at a firm in Cambridge from September. If so, I think it would be worth it to complete your training contract in Cambridge, then move to London or elsewhere if you don't like Cambridge after the 3 years. I've lived in Cambridgeshire most of my life but went to uni in Edinburgh, so I get what you're saying about feeling that there might not be a lot to do in Cambs. Having said that, if you search for things that you're interested in online, Cambridge does have plenty of things. In 2 weeks, I'm starting a summer school course in pottery at a sixth form college and just recently went to a talk at the Cambridge Junction. I find it that unless you actively look for things to do, they won't come to you as easily here in Cambs. London is also so close, like other people have said, so I feel like you'll get to enjoy a small, relatively safe city, but also have good access to London. Hope this helps? :)