Chitlins (or chitterlings) are a pig's intestines or gut. They are a delicacy in the southern states of America. Recipes and the history of chitlins can be found here.
Memphis is located in south-west Tennessee. It grew into one of the world's largest cotton markets and during the 1960s was at the centre of the African-American Civil Rights Movement. Martin Luther King was assassinated there in 1968 at the Lorraine Hotel after delivering his 'I've been to the mountaintop' speech.
Juke-joint is a vernacular term for an informal establishment where there was music, dancing and drinking. They originated in the southeastern States in the early 20th century and were primarily operated by African-Americans.