Ohio‑mid‑west‑metro‑area‑recreation‑department‑program‑coordinators‑in‑Dayton‑offer‑structured‑beginner‑mahjong‑classes‑that‑cover‑tile‑terminology,Singapore mahjong set‑valid‑winning‑hand‑combinations,‑official‑scoring‑calculation‑steps‑and‑important‑polite‑game‑table‑etiquette‑norms‑for‑new‑participant‑learners.