Del Floria's Tailor Shop

From Memory Alpha, the free Star Trek reference

Del Floria's Tailor Shop was an establishment on Deep Space 9's Promenade. (Star Trek: Deep Space Nine set decoration)

This was an homage to the popular 1960s television show The Man from U.N.C.L.E., in which Del Floria's was a tailor and dry-cleaning store in New York City and the secret entrance to U.N.C.L.E. headquarters.