Final answer:
The immediate effect of the Supreme Court decision in the Civil Rights Cases was increased segregation in public facilities.
Step-by-step explanation:
One of the immediate effects of the Supreme Court decision in the Civil Rights Cases was increased segregation in public facilities. The decision of the Supreme Court in 1883 declared the Civil Rights Act of 1875 unconstitutional, which led to the passage of state laws and policies that enforced segregation. This resulted in separate facilities for African Americans that were often inferior to those for white Americans.