His travels across America take him through one-stoplight towns and skyscraper-lined cities.But no matter his surroundings, there’s one constant for stand-up comedian James Gregory.“The four most powerful words in the English language are ‘All You Can Eat,’” said Gregory. “If I’m driving down the interstate and I see a billboard that says ‘All You Can Eat,’ I will pull over every time. It doesn’t matter if I’m hungry or not.”Gregory will have a chance to introduce himself to the all-you-can-eat buffets in McMinnville as he’s performing Friday night at the Park Theater.