If you select "Search by Category," the site just brings up another "Search by Location" which produces the same results: Atlanta Studios by category. This design doesn't seem to make much sense.
You can see other Atlanta studios when pulling up studio names by alphabet but that's little help to someone who doesn't already know the area. Someone who does wouldn't need the site anyway.
You can also see other studios by leaving out the city name and getting the studios in Georgia. Even that list is incomplete; it leaves out both Academy Ballroom and Atlanta Dance Center.
Do you have a financial interest in this site?
Added: Ah! Now I see. If you leave the fourth pull-down box set to all, it will pull up all categories. If you then select the "See More Results" button under "Dance Studios," then a list of six names will appear.
Also, I notice that "Atlanta" appears twice in the drop-down for the cities for Georgia. The two selections produce different results when a selection is also made from the fourth box.