"A Gathering of Dervishes"

To encounter so many of these holy mendicants (dervishes) in one place must have been a source of great excitement for Sevruguin in his quest for interesting photographs.

Perhaps they were gathering for some festival and I am guessing he asked them to gather together for the photo. Clearly they are posing, some with 'hookahs' in hand and at least two with flutes to their mouths.