The "Republic of Cambridge" as it is often referred to is a very liberal city, influenced greatly by the academic communities surrounding Harvard and MIT.

There is a large Haitian community in the Cambridge/Somerville area.  East Cambridge is home to many Portugese from the Azores and Portuguese speakers form Brazil (plenty of terrific Portuguese restaurants can be found along Cambridge Street). The once clorful ethnic mix of Cambridge is changing, primarily due to the exorbitant real estate prices. At one time, in the not so recent past past, Cambridge had a large population of working class people living here.  Rent control was repealed, so low income rentors can no longer afford to live here( Some of us of us were lucky enough to have bought property before the prices skyrocketed).  Still, there are lots of ethnic events at churches (the annual Greek festival for example), dance venues, festivals (the Carribean Festival and the River Festival which has music and food of all types).