So disturbing thought I had that happened in a character's backhistory. Urgathoa is all about sucking the marrow out of life and indulging but being undead can put a crimp on that. So here is something that might be whipped up.
Rite of Sensation
When cast, the target undead is able to simulate a living being. They can experience drugs and engage in sex. The type does not change and they are not capable of procreation.
So yes, after a nice feat of people they then jump on the tables and get down with any living members of the cult.(Or other victims.)