A 31-year-old man "was pronounced dead early the morning of July 11 after being found in medical distress in a room at Steamworks Baths, 3246 N. Halsted St., in Lake View" as reported by Windy City Times: "according to a CWB source, evidence of GHB -- gamma Hydroxybutyrate, referred to colloquially as a 'date rape drug' -- was discovered at the scene." Last January a 36-year-old man reportedly was found unresponsive at the bathhouse.
Such unfortunate deaths periodically happen at the gay baths. For example, in January 2014 a 45-year-old man died at the East Side Club at 227 East 56th Street in New York City while sitting naked on a bathroom toilet, and police investigated the death as a possible drug overdose because narcotics apparently were found at the scene as reported by the Daily News. And in January 2009 a 31-year-old man was found dead in one of the rented cubicles at Club Pittsburgh, and an autopsy found cocaine and ethyl chloride inhalants in his system as reported by the Post-Gazette.
Further reading that may be of interest: