There is a lot of cross border retail business in many places.
In between Fort Erie/Niagara Falls, ONT and Buffalo/Niagara Falls, NY many people from Canada come across the border to buy gasoline, cigarettes, clothes and even food.
In Buffalo a lot of men go across to Canada to see exotic dancers in establishments in Fort Erie or Niagara Falls, ONT
(so I have heard) Hurrumph
In northern VT Jay Peak ski area is only about a 1 1/2 hour ride from Montreal. About 50% of Jay’s customers come from Canada. They had a really poor revenue year last ski season because no one could cross the border.
I am sure there hundreds of examples of things like this.
And not farfrom the border. We used to ski and go up for some Brador or Molson Export in the day. That's when the alc content was around 5% and in America all the beers were like 3%