Polyamory?

I found out a group of people in my local Blues dance scene are polyamorus. So now I'm curious.

How does it work?

Do you date date multiple people? Or date one person but sleep with multiple people?

How do you deal with jealousy?

Has any of your partners ever leave you for one of their partners to start a monogamous relationship?

How do you become a part of someone's circle jerk?