Last Supper
Christian groups have different ways to celebrate this event.  The Roman Catholic mass is observed at least weekly. Lutheran, Episcopal and other denominations also do this, but their understanding of its meaning is not identical to that of the Roman Catholics. Other denominations celebrate no more than 4 times a year. Some Christian groups such as the Salvation Army do not celebrate it at all. Churches which celebrate the last supper usually have fixed rituals that are used. This is followed by the believers receiving small pieces of bread and a sip of wine or grape juice. Some churches practice "closed" communion.  This means only members of the church can participate.  Others, such as Methodists allow all those present to participate. Churches with closed communion may also deny their own members if they are not living according to the rules of the church.