When Dr. Facilier is talking to Tiana he says the line "...like a raisin in the sun...". "A Raisin in the Sun" is a play written about an African American family trying to survive and make a better life for themselves by collecting the insurance after the death of the father.
Rogers helps a beat cop handcuff a suspect and is told he comes from "Pleasure Island Caberat" to which Rogers replies "alcohol makes people into jackasses" In Pinocchio Pleasure Island is a magical island where young boys are tricked into going where they turn into literal jackasses before being sold
Ronie wears a black T-shirt with "CBGB & OMFUG" printed on it; that stands for "Country, Blue Grass, Blues & Other Music For Uplifting Gormandizers". From 1973 to 2006 CBGB was one of the hottest new music venues in Manhattan, almost always headlining some flavor of punk.
Tiana's description of her fathers heroism a cook who took up arms when the men around him were injured is very similar to the real life story of Doris "Dorie" Miller an African American cook aboard one of the ships in Pearl Harbor. During the attack he manned Anti aircraft guns and was later recognized for his heroism.