There is no catch! Any legitimate venue or entertainment act can have a free listing.
Free Entertainer sign up
There are several ways to do this. As an entertainer, band etc you can have a free listing. All you have to do is click FREE BAND SIGN UP in the main menu or click this link CLICK and fill in a few details.
Free Venue sign up
As a venue it is similar. Click the FREE VENUE SIGN UP and you will see the top choice is free, or CLICK and fill in a few details.