TAI CHI. Registration begins today at 9 a.m. for seven Thursdays starting at 12:45 p.m.: June 11, June 18, July 2, July 9, July 16, July 23 and July 30. Presented by the Arthritis Foundation. Fee of $20 payable at registration.
SEO: SEARCH ENGINE OPTIMIZATION. Learn the basic rules of creating website structure, writing website content, and using web tools to analyze search engine effectiveness. Free but registration is required. Sign up at the Information Desk, or call 516-883-4400, ext. 136. 7 p.m.