The Mass at the Polynesian is held in the area where they have the Luau. No kneeling and they ask that you don't even stand much because the tables are close together and the chairs are not the best for sit/stand/sit, etc. Full mass, somewhat informal. Very nice, though. Usually lasts less than an hour, maybe 45 min. There is a shine not too far from WDW where they have mass several times on Sunday and also on Sat evening.