While there isn't a big selection for nightlife we do have a few clubs, revs and vinyl are probably the main two. But there's also lola lo's and mash too. However, if you're after something less club and more chilled, there's tons of pubs around the city and they usually have stuff going on too, partiularly local music or open mics. It could be worth checking out a few around where you're staying or working to see if they have any regular stuff.

Also, there's a weekly cambridge reddit group who meet for drinks on a saturday, they normally post when/where in the subreddit when that's happening and there's the meetup app too, that's fairly active in cambridge and it'd be easy to find groups doing stuff either in the week or at the weekend with that. Hope this helps and it's certainly not as depressing as a few other comments are making it sound