A portable service bar, useful, for instance, as a bar or a check-in counter. The portable service bar has at least one front wall where each front wall has a top front plate pivotally attached to its upper edge, at least two side walls, where each side wall has a side top plate pivotally attached to the upper edge of the side wall, each of the side walls further being pivotally connected to edges adjacent to the upper edge of the front wall.