Visited a restaurant in the Philadelphia suburbs, General Lafayette Inn. They brew their own beer (you can watch the beermakers through a glass plank in the floor of the bar) and have this delectible raspberry mead that is served in wine glasses (the waitress said because of alchol content) but can be served in a glass when mixed with green tea or something else.
I don't know of many places that make mead ale and haven't see it in store shelves. Pity... it is quite the awesome drink.