When The Yoga Underground's four passionate instructors aren't shopping for shoes, watching the sun rise while hiking up Mount Timp, or partaking in the great American pastime of wearing crazy socks, they're hitting the mat to teach students how to build physical strength and emotional wellness. Although they consider themselves students of the ancient practice of yoga, they aren't afraid to add some modern twists into the Ashtanga and Vinyasa yoga traditions, such as incorporating core-bolstering moves from Pilates and, according to instructor Brittany, playing "really awesome music." They offer an octet of lighthearted, yet challenging classes, which includes two fast-paced kick-asana classes, a primary series, and a lunchtime yoga session that accommodates working yogis on the go.