My in-laws have started a tradition of going to the Grand Concourse every year for Easter. It's perfect for very large groups. The buffet style is nice and the servers at stations are always friendly. I find the buffet a bit daunting in terms of finding out what is gluten free (not all of the staff was always aware, and it's frustrating to stand there and wait for an answer). The food was nothing amazing --but we enjoy it for the atmosphere, the building itself, and the capability to hold large groups.
I've also gone to their bar during happy hour on a weekday. Drinks were vary reasonably priced and the bar food was delicious. I love the look and feel of the bar too.