Mystery solved. The mansion behind Seth’s is owned by Bob Pritikin, and is called Chenery House. Bob’s big bash happens on Labor Day every year, and is often described as weird and perennially odd. Bob is an adman, hotelier, magician, and one of the finest saw players in the world, apparently. And according to these pictures, his parties tend to draw a lot of local celebrities.

Bob plans to will the house to the city, to be used as either the mayor’s mansion or a cultural center.

The most exciting part about this discovery? You can tour or even rent the mansion.