We're going up to Portland for the first time, and being that it's now high Oyster season, we're excited to experience some outstanding Maine Oysters. We've heard of "Oyster Happy Hour", and would like, if possible, to enjoy gorgeously fresh raw Oysters, at a happy hour price ($1/oyster?). We live in Massachusetts and eat a LOT of raw bivalves; we've a fairly discerning palate. Suggestions? We'll be there on a Monday.