Ha! This just wouldn't fly in the States. I was all belly my last pregnancy, and was getting handed the wine menu probably until my 8th month at resturants. Because they just couldn't tell. Or perhaps, because no one wants to be the jerk who won't serve a woman alcohol, assuming she's pregnant, but isn't, she's just overweight.
I mean, what would be next? Not allowing anybody to buy cigerettes because it's proven that they cause lung cancer? Not allowing a person with diabetes to get an ice cream at ColdStone? Please.