Andy Warhol’s former studio building on Broadway and East 17th Street has been home to many businesses since the Pop artist decamped from his third-floor Factory in 1984, after a decade at 860 Broadway. A nightclub (the Underground) was there in the ‘80s, followed by a Petco in the mid-90s, which relocated nearby in 2023. The commercial building’s ground floor retail space has been vacant for the intervening years, but a new tenant has moved it. The Japanese fashion brand Uniqlo will open its seventh New York store at 860 Broadway tomorrow. 860 Broadway, where the new Uniqlo Union Square store opens on Apr. 3, 2026. It is unclear if the store expands all the way to the third floor, the former location of Warhol’s Factory. Either way, Uniqlo is using the location’s connection to Wahol’s legacy to promote the opening weekend festivities.…