A REST BETWEEN TENNIS MATCHES: Molly Hunter of Geddes Rd. and her house guest, Henrietta Hicks of Greenwich, Conn., are enthusiastic beginners in tennis and played a few matches on the Ann Arbor Golf and Outing Club courts yesterday morning. As they stopped for a brief breathing spell, the group above includes, from left to right, Molly Hunter, Nancy Griffin of Ridgeway Rd., and Henrietta. The visitor, who will be a senior at Rosemary Hall in Greenwich next year, is spending a few weeks at Riverbend, the home of Molly and her parents, Mr. and Mrs. L. R. Hunter on Geddes Rd.