Overall, Manchester is a city for doing things ore than for just ''being in' and its in its entertainment (and to some extent food) options that its attraction lies.
The Bridgewater Hall, home of the Halle, the North's best orchestra, and if you have a chance and inclination, do go and see them at their home ground.
And of course the clubbing/pop scene in Manchester, even if lacking the heady qualities of the Hacienda days, is still second to only London's.
Football fans will want to see the hallowed ground of Old Trafford (to either worship or sneer depending on their attitude to the biggest of the football brands, Manchester United). This is a tram ride away, and has a museum and tours (but no chance to see a game).
Mancunians themselves are inordinately proud of the monstrous, shopping mall called Trafford Centre, located on the outskirts of the city. You can even marry there - and some people apparently do!
Manchester's Chinatown is the biggest in the UK, and very central, with some good affordable oriental food on offer (not just Chinese but Malaysian, Thai and Indonesian too).
The ethnic food to eat in Manchester is curry - although not as famous and fabled for its Indian restaurants as Bradford, Manchester easily stand its own ground here. Rusholme is the curry Mecca (out in the southern area of the city) though there are curry options all over the city.
The cafes and pubs of the Gay Village by the Rochdale canal are perhaps the best place for a lunch/brunch in self-consciously funky but enjoyable location. Northern Quarter is big on pubs and cafes too.
Local foods of note include the famous Bury black puddings (go to Bury market for this - and pop into a fantastic sausage shop there if it's still operational) as well as the Eccles cake, a delectable round flaky pastry filled with spicy currant and raisin mixture. Harry Ramsden, now the UK-wide chain of fish and chip shops, originated in Manchester and still has its flagship store there (??? check).