Image by the author using Midjourney.
The Dark Horse Den is a gambling establishment run by a man named Tycho Jaskin. Kappa Adolus had been a frequent visitor, and Nestor Soranus was known to visit from time to time with him. Kappa liked to play cards there, and managed to build up a substantial debt.
Although there is no concrete evidence, it's likely that the building is controlled by the Cornys Family. One known member, Marzio, was working here.