Chechen variation of the Zikir, influenced by the Sufi tradition of meditation and sacred dance.
They are doing Zikir. "Dzikir or Dhikr" is a praise to Allah which is repeated over and over again. The Zikir that Allah likes are Subhanallah (Allah is perfect), Alhamdulillah (Praise be to Allah), La Ilaha Ilallah (there is no god except Allah), and AllahuAkbar (Allah is the Greatest). I think this dance is a local tradition when doing Zikir. Maybe it keeps them focused and not sleepy while doing it. because each word of Zikir is usually repeated 33, 100 or even 1000 times.