There are currently 2 active bands with the name En Masse. One is an indie/progressive/rock band from St. Augustine, Florida in the United States featuring ex-members of Twothirtyeight, Moments in Grace, Decahedron, Further Seems Forever, Exhaustra and City of Ships.
myspace.com/enmasse0 The other is an electronic duo from Milano, Bologna Italy. They are currently a part of the Hypotron Records roster.
Based between Milan and Bologna, En masse are immediately noticed and
Created a stir with the self titled EP, "En Masse EP", gone straight on