Behind a head table, a bar, a dessert table or a stage.
Around a doorway or an entrance frame.
Along a staircase railing, following the diagonal.
Across a wall as
a photo backdrop.
Along the edge of a ceiling or a beam.
Framing a sign, a screen or a branded panel.
In rooms with low ceilings a garland is the better choice over an arch, because it does not add a horizontal element overhead.