Here is my 2 cents worth. If you have lots of time to do your comm then go for a club, on the other hand if you are a person who likes structure and a plan for your training go to a school. The laid back feeling at a club is nice but if you are serious about your training then it is not for you. I know things happen at a club that in order to have a ground school there must be a certain minimum number of students, if there are not enough then no ground school and you have to wait for next time.
Ask the school for your training program and if they can give you a structured program on paper and not just a few words go for that school.
I would recommend Progress.