When visiting with the Pikes Peak Running Club a couple of weeks ago, they showed us some reports they had from their old system they had developed themselves. The reports were such a good idea, we added them for every running club.
Just go to Members and then click on the Green Actions drop down and select Reports. The example at the right show the total membership, broken down in color by type (for them Individual, Family and Student). The bottom graph shows New and Renewals for the club.