According to Andy Warhol (via Pat Hackett in Popism), he noticed Candy Darling and Jackie Curtis while walking through Greenwich Village with Fred Hughes on their way to pick up some trousers that Warhol was having made at the Leather Man.
Walking just ahead of us was a boy about nineteen or twenty with wispy Beatle bangs, and next to him was a tall, sensational blonde drag queen in very high heels and a sundress that she made sure had one strap falling onto her upper arm." (POP225)
Jackie noticed Andy and asked for his autograph on a paper bag he was carrying from the English clothes boutique Countdown. When Andy asked what was is in the bag, Jackie told him Satin shorts for the tap-dancing in my new play, Glamour, Glory and Gold. It opens in September; Ill send you an invitation. My names Jackie Curtis. (ibid)
Andy took a closer look at Candy: She was much more attractive from a distance - up close, I could see that she had real problems with her teeth, but she was still the most striking queen around. Jackie introduced the blonde as 'Hope Slattery,' which was the name Candy was using in those days - her real name was Jimmy Slattery and she was from Massapequa, Long Island. (ibid)
(According to an interview that Jackie Curtis gave to Patrick Smith in Andy Warhol's Art and Films, Jackie first met Andy Warhol in 1965 on 42nd Street and 2nd Avenue when whe was staying at the YMCA across the street from the silver Factory.) (PS273)