I would say a Tunick shoot, normally though they close the places down (Selfridges in London for example), at Gateshead (again in the UK), the Baltic Centre was open and trading when the later shots were taken. His Grand Central Station shots were women only, and I think men are present here, so I 'll take a guess and Baltic Centre shoot by Tunick in 2005......or Selfridges
PETA (or similar) protests are normally outside!