Just pass a bill to require that all building lobbies include the smell of stale urine. San Francisco literally reeks.
Ha-ha! It's just not urine, I've seen homeless people crapping in the doorways in downtown SF. The better businesses hose it down every morning.
Down near the waterfront where the building boom is going on, there's a problem with antiquated sewage systems. I worked for many years at One Market, a set of high-rise towers at the Bay waterfront. The new Transbay Terminal is a couple blocks from there. Often-times the area reeks of sewage, as it backs up underground in pipes alongside the piers. Every new skyscraper adds hundreds if not thousands of workers who add extra flushes into the mix. The City is aware of the problem and is constantly monitoring sewers in order to clear backups, but is hard pressed to keep up. The good news is that you can fart and no" no notices.