Join the Mercer Island Beach Club (MIBC) team! MIBC is a premier 500 member owned, family-oriented club sited on 7.5 acres of Lake Washington waterfront facing Mount Rainier. The property includes a year-round eight-lane Competition pool, bubbled Activity pool, state-of-the-art Fitness Center, six outdoor tennis courts & pickleball courts, beach and lake swimming, a marina and year-round clubhouse facility.