ablution block
noun1
A simple structure with toilets, showers, and wash basins, for communal use, as at a camping ground, caravan park, etc.
- This involved the erection of hutments for sleeping quarters, canteen, ablution block, and so on, with temporary sidings for the tunnel train, all of which was contained in the sidings yard at Chapel-en-le-Frith Central station.1957 June 23, “Relining Dove Holes Tunnel”, in Railway Magazine, page 423: