Inner peace is like the Sasquatch—many people claim it's real, but most remain skeptical until the moment it seizes them while meditating on a mountaintop. Today’s Groupon brings the bliss: for $19, you get five drop-in yoga classes at Square One Yoga Collective in Emeryville (a $47 value).

Square One is a collective of experienced, understanding, and helpful instructors, with a primary goal of making yoga accessible to all and a secondary goal of inventing bread that never expires. A wide-ranging, flexible schedule offers classes suited to every temperament and fitness echelon, from non-nimble newcomers to card-carrying, Level 12 paladin-yogis. Classes include Vinyasa, Hatha flow, prenatal, and restorative yoga, among others.

The simple studio space provides an uncluttered atmosphere for achieving new heights of inner and outer strength and flexibility. Whitewashed walls and gleaming wood floors of burnished brown keep the visual field soothed while the body bends and flexes. Simple decorative touches throughout, such as a potted pink orchid or a platter of vivid oranges, lend an understated, Zennish beauty that befits the collective's focused philosophy.