ATMs in southern Wisconsin used to run under the brand Take Your Money Everywhere or TYME. The iconic machines were known as Tyme Machines instead of ATMs. They were notorious for "closing" with a sliding iron door coming down just when one needed to make a withdrawal. Visitors likely believed the worst of Madison's detractors when locals asked "Is the Tyme machine open?"
The Hollywood sign has been changed to "Hollyweed" on a few occasions, once in the '70s after legislation that would decriminalize marijuana, as well as for a scene in a movie. Since then marijuana culture has defined LA through the prevalence of medical marijuana. People have tried to profit from the Hollyweed name by selling t-shirts with the silly moniker.
Highway Enforcement of Aggressive Traffic, when Georgia law enforcement cracks down on dangerous, high-speed and aggressive drivers.
New Orleans cemeteries (due to the high water table, people in New Orleans are buried above ground).
Honolulu's (as well as the rest of Hawaii's) area code is 808. People will sometimes say "representin' the 808" to identify themselves as Hawaiians.