Assuming everything I'm going to suggest is already planned further down the road... A Jewelry store at the mall, earrings, bracelets, basic piercings. Once the red light district is available, an adult toy & fetish clothing store, a tattoo & body piercing parlor (something you could convince Mom or best friend Patricia to visit with the MC). Last thought is two different brothels, one vanilla with a glory hole also, and another one that's fetish (BDSM, etc).