Nip your cheeks together

Me and the lads from the band went out touting for gigs tonight, we tried a couple of pubs in Hartlepool. We called into the 'Causeway' first, spoke to the landlord and had a pint. I had to go to the loo, and when I opened the door I was met with this sign taped onto the cubicle door. Just as well I only wanted a wee!