Speaking of Westmount, there's a great kinda 50s style diner in Westmount called Chez Nick's.Does look like Beauty's, but definately not in Westmount. Beauty's is an instituion in Montréal, opened since 1942, never changed location. Newly renovated it re-opened recently, 93 avenue du Mont-Royal O.
They got good breakfast there and it's very Anglophone there. I feel like I'm in Ontario there lol