I used to work at a place owned by Satmar and during the “Holiday season” they would provide dinner to the workers because they had to work late because of the extra customers.
Even though the place was owned by Satmar’s the workers were all kind and there was a running joke about some meals being Satmar meals and other being Lubavich meals. It seems the Lubavichers would not eat the meat from the Satmar place and would only eat the fish meals