Honestly how often do you go to a place without Wi-Fi these days?
Once upon a time they had special pens that flashed when you were near Wi-Fi. Now do you know what that's called? A FLASHING PEN. We're in a world where Wi-Fi has been declared a basic human right and even coffee shops often give it away for free AND YOU CAN'T EVEN GET FREE WATER AT THOSE COFFEE SHOPS. Probably you'll be just fine with an iPad that needs Wi-Fi. And if not, maybe find a better class of coffee shop.