Tournament american mahjong setIllinois‑south‑suburban‑neighborhood‑associations‑based‑around‑Chicago‑Heights‑occasionally‑rent‑club‑facility‑space‑for‑large‑group‑mahjong‑potluck‑gatherings‑that‑unite‑dozens‑of‑local‑hobby‑enthusiasts‑for‑an‑entire‑day‑of‑tile‑game‑competition‑and‑friendly‑social‑connection‑building‑activities.