if you're having a bit of a do and want to jolly up the place, it's hard to go wrong with a bit of bunting - particularly when it is made from recycled paper in a satisfyingly non-twee colour palette. (plus if you take care of it you can keep using it year after year)
    paper bunting eco friendly party decorations triangles garland smallable babystylefile baby style file 
triangles garland, €5 for 80cm, smallable