Eva Longoria appeared as a Super Club employee named Lily, in a scene filmed as an alternate opening deleted from the theatrical release. The scene is found in the "Special Features" section of the DVD.
Dane Cook is a die hard Boston Red Sox fan. In the movie when Super Club is playing Maxi Mart in the baseball game. Super Club is Red (in honor of the Sox) and Maxi Mart is Gray and Blue (in honor of the Yankees). This is a play on the famous rivalry.
The store manager's name was named Glen Gary. His brother, the corporate supervisor, was named Glen Ross, a reference to Glengarry Glen Ross (1992). The reference is furthered when the HR lady lies about Dane Cook's resignation notice still being in the office, and not having been sent to corporate.
Rusty states that only 4 people know about their clubhouse, however, this is untrue for two reasons. Reason one, Pete has to raise them up to the platform where the clubhouse is located. The second reason is because, unbeknownst to Rusty, Zack took Amy there on their date.