カード会員[kaadokaiin] (credit) card holder
ユダヤ教会堂[yudayakyoukaidou] synagogue
委員会[iinkai] committee
医会[ikai] medical society
医師会[ishikai] medical association

井戸端会議[idobatakaigi] content-free chat
育英会[ikueikai] scholarship society
一期一会[ichigoichie] once-in-a-lifetime encounter (hence should be cherished as such)
一般会計[ippankaikei] general accounting and finance
一般社会[ippanshakai] general public

加餐[kasan] caring for one's health
午餐[gosan] lunch
午餐会[gosankai] luncheon party
最後の晩餐[saigonobansan] the Last Supper
主の晩餐[shunobansan] the Lord's Supper

正餐[seisan] banquet
聖餐[seisan] Holy Communion
昼餐[chuusan] luncheon
晩餐[bansan] dinner
晩餐会[bansankai] dinner party