Sounds like the Northern Quarter is definitely the place for you
No ping pong bars I'm afraid, but some good bars and boozers. I agree that you may struggle in a few places in the NQ as a stag do. And a stag do would be as welcome in Canal Street as a fart in a lift.
You'll probably end up somewhere absolutely hideous like the Printworks, or a cattle market in Piccadilly. Manchester's not really a Stag Do kind of place
To be fair to us I don't imagine we'll be marauding across the city like a bunch of loons. We're leaving our Welsh friends behind after all
I'm from Devon anyway so Manchester is pretty up t'north to me. I always imagined they were a friendly bunch up there