I'm based in Leeds, so I'm more West Yorkshire than North, but I do know there is a monthly event in Leeds called Leeds First Friday that have a FB page that maybe able to lead you to people in York.
I mean to pop down just to see what the deal is, but it seems like it's geared more to CD and TVs than people that are TS and isn't the kind of support I need/scene I want to be part of (fair play to them, it's just not for me)