I am astounded. I have had a couple of sublime dining experiences at La Grenouille which I had always considered to among the greatest French dining experiences in New York.
That conduct like this should take place in a restaurant of this stature is so unacceptable as to be incredible.
(N.B. Even these grandes dames do not charge $100 per entrée. Typically their prix fixe run in the $70 range for three or four courses, and $100 would probably cover you for three or four courses à la carte.)