The X20 Mod is intended to bring the design philosophy of the Vampire tabletop RPG's 20th Anniversary Editions to Bloodlines: to make it feel like it fits into the wider World of Darkness setting by including references both overt and subtle, obvious and deep-dive, referencing material that came out before Bloodlines and after. One of Clan Quest Mod's recommended mods!
We know Tap Hotel is one of Gary's big movies, so it stands to reason he'd have a poster in his haven. Edited from a Fred Astaire/Ginger Rogers poster, "Top Hat."