When at a club, a group of three or more males proceed to dance in a man circle to potentially attract females to dance with.
Unlike its origin "mancing", this takes place in public at bars, clubs, family parties, etc., and usually takes the shape of a circle with females usually within close range.
Common cirlicular mancing songs: All techno, "Free Falling" - Tom Petty, "Sweet Caroline" - Neil Diamond.
Instead of staying after school for extra-curricular activities you stay for sextra-curricular ones. Which usually involve a teacher, a student and a desk. Often related to trying to get sextra credit, but it can just be for the heck of it.
Student 1: Are you catching the bus tonight?
Student 2: Nah, I've got to stay behind for some sextra-curricular activities or else I'm going to fail geography.