Air freshners: Motor Vehicle Maintenance & Repair (smells like mechanical oil), Code Review (smells like sweat and blood), The Workplace (better get lucky with the smell :P), Raspberry Pi (smells like actual raspberries), Personal Finance & Money (smells like cold, hard cash), Biology (smells like exerted substances), Pets (smells like exerted substances and hair), Skeptics (mind reader, smells like what you're craving), Space Exploration (nothing, it's space!), Woodworking (smells like, well, wood), Homebrewing (smells like unfermented beer), Poker (smells like smoke 'n' alcohol) and Hardw…