Actually "Remember the ROAR" was the slogan they coined in the farewell season of the Stadium. Hawks were in a sorry state then and it wasn't long before fans had co-opted it to be "Remember to SCORE".

I miss that old place. Used to be semi-regular up in the 300 level (nosebleed); the old school design of that place stacked each level pretty much on top of the other so you were still right over the ice even in the cheap seats instead of way back like newer designs. That place got LOUD, too.
One of my best friends is a Canadian, same age as me, that grew up outside Montreal as a rabid Habs fan and was a regular at the old Forum and he said the Stadium was the best place he ever went for a hockey game.