This is a cute ad, but more relevant is that it’s an openly gay-themed ad from a type shop, the only one I’ve come across so far. Once in a while I’ve seen typesetter credits in a colophon. Occasionally, there’ll be small, plain in-trade ads for printers. I assume in both those cases they would involve businesses untroubled by the association with gay content. But good for Boro Typographers of (I deduce) Philadelphia, PA! (That’s where Drum was published.)