Look at it as an an opportunity to discover some new routes. Our hike & bike trails are similarly choked with clueless masses and the downtown streets are heavily trafficked, so most of my routes take me through back-alleys, residential neighborhoods, outlaw urban singletracks, deserted warehouse parking lots, golf course cart paths, and other sparsely-used infrastructure. And nighttime riding is another great way to dodge humanity -- a good helmet and/or handlebar light allows you to enjoy public spaces in almost total solitude once everyone goes home for dinner.