The O2 Yoga & Wellness Studio is hosting a free half-day yoga retreat 9 a.m. to noon Sunday. Christy Tews, a long-time practitioner and teacher, will be giving a talk on “choiceless awareness.” There will be a period of sitting and walking meditation. Tews is a graduate of the Community Dharma Leader program at Spirit Rock Meditation Center. She has been meditating since 1985. She holds a bachelor of arts with honors in home economics from the University of Iowa, and is a licensed minister in Nevada. She has traveled extensively in India, Nepal, Tibet and China and leads pilgrimages to the sacred sites of the Buddha in India. Beginners to experienced meditators welcome. Bring a cushion if you would like to sit on the floor; chairs are available.The O2 Yoga & Wellness Studio is located at 1557 Zeroline Place in Minden.For more information, call 790-2501 or visit the Dharma Zephyr Insight Meditation Community website at http://www.DharmaZephyr.org.