The most common usage of this acronym is used for the "Ku Klux Klan," an organization that strives for white supremacy. There are many other meanings for "KKK"; visit the related link below to view them all.
I believe you are referring to the "on deck" circles. This is where the next batter up is to stand to warm up and take practice swings. ---- The circles closest to home plate are used in fielding practice and is where the coach stands to hit fungoes (ground balls and fly balls) to the fielders.
Yes they do. the KKK is still around today but their isn't many KKK members now. there is about 6,000 KKK members who's still alive today. Some KKK members are still alive from the 2nd KKK which lasted from 1915-1944.