PHRASES LIKE worship service and service of worship are tautologies. To worship God means to serve God. Basically there are two ways to do it. One way is to do things for God that God needs to have done—run errands for God, carry messages for God, fight on God's side, feed God's lambs, and so on. The other way is to do things for God that you need to do—sing songs for God, create beautiful things for God, give things up for God, tell God what's on your mind and in your heart, in general rejoice in God and make a fool of yourself for God the way lovers have always made fools of themselves for the one they love.
A Quaker meeting, a pontifical High Mass, the family service at Zion Episcopal, a Holy Roller happening—unless there is an element of joy and foolishness in the proceedings, the time would be better spent doing something useful.