While Paris’ largest museum, the Louvre, has yet to implement a ban, both the National Portrait Gallery in London and the Centre Georges Pompidou (essentially Paris’ version of MoMA) are both reviewing their policies on the unsightly accessory.
For your reference, here's a list of major sites that've told tourist to stick their selfie sticks where the sun don't shine... You know, the closet.
Smithsonian Museums - Washington, D.C.
The Metropolitan Museum of Art - New York, NY
The Museum of Modern Art - New York, NY
The Art Institute of Chicago - Chicago, IL
Detroit Institute of Arts - Detroit, MI
The Chrysler Museum of Art - Norfolk, VA