The Harley is the most over priced, pretentious pub that I've ever had the misfortune of stepping into. On a non-live night, the music played is all the modern 'indie' stuff, and the place is filled with checked shirts and skinny jeans, and a distinct lack of dancing. I guess the people that go there are just too cool for such mundane actions as dancing.
However, on a live night, The Harley, surprisingly enough, becomes even worse. You will have to pay an exorbitant fee to enter the 'Not for profit disorganisation', to listen to one or two exceptionally average bands that play there. The drinks, somehow, manage to take a step up in price, so be prepared to fast for a week afterwards if you visit to Harley and intend to buy more than a single cider.
So, all in all, The Harley is to be avoided at all costs. Unless you enjoy listening to bland indie songs and being surrounded by pretentious students with more money than sense, and a nonchalant, 'just got out of bed' hairdo that takes no less that 2 hours to set. Go somewhere else, anywhere else, if you'd like to have a good night in Sheffield.