There is often much discussion of attendance around baseball, especially with the Reds.
Thought it worth noting that the Reds are 4th in average attendance per game over a 3-year period (2009-2011) in relative proportion to their U.S. Census, Core-Based Statistical Area (CBSA).
1. Milwaukee (2.35%)
2. St. Louis (1.43%)
3. Colorado (1.37%)
4. Cincinnati (1.16%)
5. Minnesota (1.10%)
There are a few big market teams that do well (Boston, San Francisco, Baltimore, Seattle and Philly), though most of the big-hitters are in the bottom half. To be fair, some of the bigger teams do often sell-out their games, so they're sometimes limited in how many they can draw relative to their size.
Here is the complete list...