Congregational zikr
Q: In my local Musjid sometimes after magrib salaah they do mehfil zikr for about 5-10 minutes. They would start off by turning off the lights and we would sit on the floor and have a main person who guides us through the zikr. Throughout the zikr I heard things or words that I have never heard of such as 'Haqhu' and 'Jalashanoo' they would say it in quite an aggressive way which gave me doubts regarding the zikr that had been taking place. My question is:
1. Is this whole gathering permissible?
2. The words used in the aggressive manner 'Haqhu and Jalashanoo' , can they be used?
3. What is Imam Abu Hanifas opinion regarding mehfil zikr?