According to memory-alpha the Deep Space Nine promenade directory of businesses contained a large number of in-jokes and references to other sci-fi shows:
The directory appeared on the Promenade beginning with Season 2. The DS9 art department incorporated numerous jokes and references in the directory's listings, including "Jupiter Mining Corporation" and "Diva Droid" (both references to Red Dwarf, being the company that operated the ship Red Dwarf and the company that built the service droid Kryten respectively), "Milliways" (The Restaurant at the End of the Universe from The Hitchhiker's Guide to the Galaxy), "Spacely Sprockets" (The Jetsons), "Del Floria's Tailor Shop" (The Man from U.N.C.L.E.), and "Chez Zimmerman" (a reference to Herman Zimmerman, the show's production designer and the man responsible for much of the look of the Promenade set).
I was wondering if any of these are ever visible on screen in any episode of Deep Space Nine?