picture-taking can run neck-and-neck with betting and sipping mint juleps .
churchill downs , which hosts the annual kentucky derby on may 1st and 2nd , has banned the pole-like contraptions that grasp cellphones and allow people a longer reach to snap their self-portraits .
but this year , they 'd better not use selfie sticks .
joining a growing list of museums , music festivals and sports venues around the world .