Jehovahs Witnesses are lovely people, I should know - I officially still am one ... but ... although their great cult leader, Judge Joseph Rutherford, banned them from taking part in the evil pagan celebrations of birthdays and such, there is one ceremony that is ridgedly and solemly adhered to. The anual celebration of the "Lords evening meal". As most here are aware, each Nissan14, Kingdom Halls around the world are packed to the collection boxes with the 'happiest people on earth'. A 'memorial talk is then given in which all in attendance are left in no doubt that to partake of the bread and wine about to be 'served' is strictly for the 8,000 or so of 'the little flock class' - the 'remnant' of Jesus 144,000 asigned to heavenly life. (people like YouKnow, Bruce144, bibleman and logical)
After reading Jesus instructions from Matthew 26: "take this bread it means my body" plates of unleaven bread are passed around the Hall. Following that, Jesus instuctions "take this cup it means my blood" is read out and cups of red wine are passed around. The interesting thing is that the attendants are instructed that everone in attendence must be handed the plate and then hand it back or on to the next person (it is humourous and revealing to see the attendants passing the plates back and forth between themselves - it isn't enough not to partake - you must make an active act of rejection of Jesus sacrafice! For Jehovahs Witnesses denying the body and blood of Christ is a formal ritual rejecting Jesus risen and as contrary to Jesus direct instructions "do this thing in rememberance of me" as any Satanic coven may invent.
PS: Of course the entire ceremony is of ancient pagan origin anyway (see Mithrism)