Came here with my family for a late-ish dinner on a Monday night and enjoyed it immensely. We started with the crispy confit wings and the Tabasco fried chicken--unlike some of the other reviewers, I didn't find either of the dishes to be particularly small. There were maybe 20 wings on the plate and two enormous pieces of fried chicken--a leg and a thigh. I preferred the fried chicken, which was juicy and pleasantly spicy.
We split the pig head. Normally I'm squeamish about eating something that still looks like an animal (blame my sanitized Millennial upbringing) but it was absolutely fantastic! The meat was juicy and tender, and the "bark" of the pig was sweet like candy. Even a temporary unsettling moment that occurred as my brother picked up the jawbone with the teeth and held it up to his own face didn't stop me from plowing through it. I also tried the Alsatian risotto and it was AMAZING--the squash pickles were a perfect foil for the rich risotto.
Service could have been a little better--the waitstaff seemed a little flustered throughout the entire meal, though not necessarily unfriendly--but otherwise Greenhouse Tavern is an awesome spot in Cleveland!