January 16, 2012 (La Mesa)--Grossmont Healthcare District’s Dr. William C. Herrick Community Health Care Library, 9001 Wakarusa St. in La Mesa, will host a free seniors discussion group on “What is Laughter Yoga” from 10 to 11 a.m., Wednesday, Jan. 25. The public is invited to attend, and RSVP is not required. The speaker will be Michael Coleman, executive director of Laughter Matters, a San Diego-based non-profit organization that promotes the physical, mental and social health benefits of laughter yoga.