Another interesting side light of Illya Darling
One of the members of the ensemble went on to greater fame by appearing in a ground breaking play and its movie adaptation.
Robert La Tourneaux (Timid Sailor) who one year and three days later would appear in Mart Crowley's The Boys In the Band. He played the role of Cowboy (Harold's birthday present)

From a photo session where he also posed nude for After Dark a "gay but not gay" entertainment magazine (1968-1982)
For La Tourneaux it would be more of a curse than a stepping. La Tourneaux was openly gay and that was very bold in the early 70's. He would appear in three other films in small roles and one more play on Broadway.
He would later go on to do a cabaret act at gay adult movie theater. in 1983 he was convicted of assault and went to Rikers.
He contacted HIV and the full blown AIDS during his stay.
He made headlines when he sued his landlord who wanted to evict him from his apartment because he had AIDS. He won his case and he died in1986.

As Cowboy in The Boys In the Band