The Chakra system you learned is based on a misinterpretation of Tantra Yoga's Chakra System.
Most ancient cultures have a subtle body energy system which was used for healing and creation purposes. The one most used in the west is a based on a misinterpretation of a yogic text called Sat-Cakra-Nirupana By Purnananda Swami.
In this 7-day course, you will learn about the chakra system before and after it became westernized. Be prepared to unlearn and reorganize your thoughts about the subtle body.