| City | Attendees |
| Albuquerque - August 18, 2008 | 73 |
| Atlanta - July 13, 2005 | 91 |
| Atlanta - August 8, 2006 | 138 |
| Atlanta - August 9, 2007 | 140 |
| Baltimore - May 31, 2008 | 44 |
| Birmingham - June 24, 2008 | 46 |
| Boston - December 7, 2005 | 91 |
| Boston - September 28, 2006 | 229 |
| Boston - October 23, 2007 | 305 |
| Boston - September 23, 2008 | 209 |
| Chapel Hill - June 8, 2005 | 85 |
| Chapel Hill - June 20, 2006 | 77 |
| Chapel Hill - October 3, 2007 | 101 |
| Chapel Hill - September 16, 2008 | 89 |
| Chicago - January 19, 2005 | 148 |
| Chicago - January 11, 2006 | 214 |
| Chicago - December 6, 2006 | 302 |
| Chicago - July 7, 2007 | 237 |
| Chicago - February 21, 2008 | 182 |
| Chicago - August 27, 2008 | 262 |
| Cincinnati - November 4, 2006 | 74 |
| Cleveland - October 19, 2005 | 128 |
| Cleveland - October 11, 2006 | 195 |
| Cleveland - August 21, 2007 | 232 |
| Cleveland - August 4, 2008 | 180 |
| Columbus - February 5, 2008 | 78 |
| Dallas - September 7, 2006 | 138 |
| Dallas - September 6, 2007 | 84 |
| Dallas - July 14, 2008 | 110 |
| Denver - May 20, 2008 | 50 |
| Detroit - May 20, 2006 | 78 |
| Detroit - July 28, 2007 | 154 |
| Detroit - July 29, 2008 | 210 |
| Houston - January 28, 2006 | 175 |
| Houston - December 3, 2007 | 304 |
| Indianapolis - October 21, 2006 | 56 |
| Kansas City - July 22, 2008 | 115 |
| Los Angeles - September 21, 2005 | 209 |
| Los Angeles - June 7, 2006 | 102 |
| Los Angeles - September 20, 2007 | 351 |
| Los Angeles - September 8, 2008 | 259 |
| Miami - October 26, 2006 | 65 |
| Milwaukee - September 16, 2006 | 131 |
| Milwaukee - January 12, 2008 | 81 |
| Milwaukee - October 20, 2008 | 56 |
| Minneapolis - September 28, 2007 | 83 |
| Minneapolis - November 10, 2008 | 57 |
| New Haven - March 1, 2008 | 128 |
| Newark - June 19, 2008 | 71 |
| New York - July 27 2005 | 293 |
| New York - May 13, 2006 | 231 |
| New York - August 2, 2007 | 615 |
| New York - August 21, 2008 | 563 |
| Philadelphia - February 11, 2006 | 142 |
| Philadelphia - February 24, 2007 | 156 |
| Philadelphia - January 26, 2008 | 268 |
| Phoenix - September 25, 2008 | 90 |
| Salt Lake City - July 31, 2008 | 88 |
| San Francisco - February 8, 2006 | 115 |
| San Francisco - November 5, 2007 | 184 |
| San Francisco - November 20, 2008 | 226 |
| Seattle - October 5, 2004 | 83 |
| Seattle - November 16, 2005 | 46 |
| Seattle - January 11, 2007 | 94 |
| Seattle - October 11, 2007 | 77 |
| Seattle - October 27, 2008 | 67 |
| St. Louis - September 7, 2005 | 107 |
| St. Louis - July 11, 2006 | 150 |
| St. Louis - November 14, 2007 | 161 |
| Washington, DC - October 6, 2005 | 120 |
| Washington, DC - July 19, 2006 | 208 |
| Washington, DC - July 18, 2007 | 151 |
| Washington, DC - October 7, 2008 | 148 |