Check these statistics out:

Last year the Hornets ranked LAST out of 30 teams: http://sports.espn.go.com/nba/attendance?year=2005

Last year the Saints ranked #23 out of 32 teams in attendance.
http://sports.espn.go.com/nfl/attendance?year=2004

The Super Dome seats 72,900. Their AVG attendance last year was 64,147, 88% of capacity.

San Antonio is #26 out of 32, but it's important to note that the Alamo Dome only seats 65,000, and AVG attendance so far has been 64,147, 99% of capacity.
http://sports.espn.go.com/nfl/attendance?year=2005