Set in Mercer Island, WA, Community Pool (mercer Island) is the kind of local stop that works for players who want a useful place to rally, drill, or meet for doubles. With 2 listed hard courts, the location can support anything from a quick warm-up to a more organized doubles rotation when space is available. Hard courts reward early preparation, solid movement, and consistent contact, so this is a sensible place for practicing tennis with structure. The schedule note is Dawn to Dusk; that detail matters if you are organizing tennis partners or trying to avoid peak demand. Since lights are not listed, plan around daylight and avoid cutting a close match too near sunset. For booking, look for posted rules or a city reservation page; otherwise, plan for first-come, first-served play and a friendly rotation. A no-fee listing makes it easier to invite a new partner, test a tennis coach, or add one more weekly hit. Players could use it for tennis lessons for adults, private tennis lessons, rally games, live-ball drills, or a friendly set after work when facility rules allow.