Don't ask. It falls under the "Don't think" rule.
Recently tried to take a picture at a dental surgeon’s office. I had some Fomapan 100 BnW loaded in the Fisheye. My big mistake? I asked permission. Fear of gathering evidence and then liability. I still dream about the shot that might have been. You’d think that after paying $1145 for a procedure, you’d give me a break about the photo.