Anywhere in Matthew Street is buzzing especially the big wetherspoons which you could spend all night in. It reminded me of the one in Cardiff which was basically pub/restaurant/ nightclub rolled into one. The Peaky Blinders pub is a novelty if you're a fan of the show but otherwise not great. If you like Chinese food there are some cracking eateries in Chinatown, reasonable too,, just ask a local.
Edited to add there's a big inflatable assault course wipeout style down near Albert Dock if you're looking for something different. We did it on a stag recently and it was some laugh! 😁