Shockproof mahjong caseWisconsin‑lake‑michigan‑coastal‑city‑senior‑center‑activity‑coordinators‑inside‑Green‑Bay‑organize‑weekly‑mahjong‑social‑game‑hours‑that‑are‑very‑well‑attended‑by‑local‑senior‑adult‑citizens‑who‑value‑the‑mental‑challenge‑of‑tile‑game‑strategy‑decision‑making‑along‑with‑the‑valuable‑opportunity‑for‑casual‑friendly‑peer‑to‑peer‑social‑conversation‑and‑companionship‑that‑these‑regular‑repeating‑indoor‑game‑gatherings‑reliably‑provide‑through‑cold‑winter‑and‑mild‑summer‑calendar‑seasons‑alike‑every‑year‑time‑cycle‑period.