Don't ask me why, but randomly thinking of what kinds of perfume Chicago and the people around him would wear.
I feel from Chicago himself, he's not a big perfume or cologne user, maybe having one or two and not wearing them most the time. They're likely rather woody or subtly citrus/flower smells.
I know MTT and Papyrus where perfume/cologne. Mettaton has his own line of them and in the game, Papyrus dabs a whole bunch of scents and beauty products behind his ear (despite not having ears) in his fight. From bone cologne to beauty yogurt and even marina sauce.
For Broadway, glee'd likely follow in MTT footsteps. Especially as she grows up to be a fashion designer, I can see that also results in them having glare own scents to go with it.
For Rexi though, I can see him both using cologne and perfume and not. Definitely in his younger years when he's going along with Broadway and his family's whole pop celeb fame thing, but once he's older and goes out on his own, I can see him using it less. Though I can also definitely see him just going for different scents and still using cologne religiously to cover up the smell of sweat and smoke.
I can't for the life of me see Maxi using perfume or cologne. They're scents come from sweat and motor oil. Or just motor oil. I'm not sure a robot can sweat. Either way, they're a mechanical animatronic who's also a mechanic, I doubt they care much about how they smell.
For the HotSpots, Taffy's signature scents are always sweet smells. Like cotton candy, bubblegum, and vanilla. Neil strikes me as having a refined taste, though I don't know what scents specifically he'd lean to. Blaze loves strong citrus and floral scents, and Blane goes for more... interesting scents. Like, I feel if Monster Energy and Mountain Dew could be perfumes, Blane would wear them.
