Flo Lambert knows how to get her students moving: In her weekly Power Yoga classes, aspiring yogis sweat and flow through a challenging series of poses, guided by Lambert's gentle prodding. On the fourth Friday of every month, she gets primal, incorporating live drums to stimulate the mind as well as the booty. The drummers take their cues from Alya Sylla, a master djembe player who arrived in Denver from Guinea, West Africa, last December. The monthly Yoga Jams provide a range of unique experience: Where else can you experience world-class drumming while balancing on your head? This is a ritualistic and rowdy way to practice yoga, which also makes it a lot of fun.