Tournament american mahjong setLehigh‑valley‑neighborhood‑social‑circles‑around‑Allentown‑form‑informal‑rotating‑host‑mahjong‑groups‑where‑group‑members‑take‑turns‑hosting‑multi‑hour‑tile‑game‑parties‑inside‑their‑own‑private‑family‑homes‑on‑weekend‑afternoons.