He runs and own The Orcish Fool, a tavern in the Varshk slums.
Gruff, and unfriendly Groz is a man not looking to comfort you. He will take your coin, and give you something in return. He runs a service.
He won the Orcish Fool in an arm wrestling competition with the previous owner, after he had a stint with him about the name. The one condition was if Groz won, he had to keep the name. And so Groz does, grumpily so.