My daughter is in Grizedale college, and she was in a Townhouse of 12 last year. She is not sporty either, although this year she does do Badminton now.. She was also an introvert before starting uni, but shes really glad she chose Grizedale (her other choice was County). No matter which college she goes to, she will have the most amazing time.
For my daughter, everyone in the flat was different.1 does kayaking and 1 korfball, some did football, but the rest did not do a sport at all.Some introverts others extroverts. She loves Grizedale college bar, although now shes second year, she is part of a pub team quiz at Pendle Witch in Lancaster and she goes there as well as Pendle Rooms at the college next to Grizedale mainly. She also likes the Fylde Bar as well as they do great food.
Any of the other colleges would be good socially. Its down to the individual and whether they get themselves out there by joining societies, and saying hi to their flatmates, also socialising with people on thier course. She had a door stop on her room door on move in day so people would come and say hi, and brought some choccies and put them in the kitchen with a note from her saying hi.