Bikram: A popular style of hot yoga created by Bikram Choudhury. Every 90-minute class takes students through a set sequence of 26 poses. No inversions (think handstands and headstands) or arm balances (like plank) required.
Vinyasa: Quick-paced and flowing, this style has students moving steadily from pose to pose in a series of movements synchronized with breath. Each class usually offers a difference sequence of poses, allowing for plenty of creative variety.
Kundalini: In this style of yoga, the emphasis is on the breath, chanting and meditation. Poses are held for longer periods of time, from anywhere from three to 11 minutes or longer, usually while seated. The aim is to move energy up through the body, an experience known as kundalini rising.
Source: Wikipedia and “Teaching Yoga” by Mark Stephens