Midway Club is the largest young club mainly for ice skaters, but more and training on inline mow.
Geared toward training and races, this site list all the local races and training for them
Minnesota inline skate club:
This is a great club to be involved with if you are starting out skating in twin cities. They meet once per week for sure, and website is the best for lists of great skate trails, with ratings on them too. Great place to start.