Is this part of a chain of restaurants? I thought it was only in Boston, Massachusetts. Or was the one in Boston the first one that started a chain of Chart House restaurants?

Yes, but you don't get that impression when you eat there. The attention to detail is better than your average chain.

I don't know if there is a chain of Chart House restaurants, what I do know is that ot is owned by the same group that owns Landry's Seafood.

Part of a group of restaurants owned by Landry's.

Yes