Excelsior Hôtel Regina in Nice, France. One of these men was was known to be in Company "D", 2nd Engineers.
The whole group is thought to be from the 2nd Engineers. The hotel and statue are still there.
Photograph taken February 1919.
The link below is to another very similar photograph. These two photographs almost certainly indicate that the hotel was operated by the YMCA for soldiers on furlough.