Three bucks isn't even enough for a piece of nigiri at Oishii, but at the bargain sushi standby Blue Fin, it'll get you six tangy sweet mouthfuls of the Japanese Squash roll. Made of pickled gourd strips called kampyō, it's just one of the seven $3 vegetarian rolls on the menu (others include ingredients like yellow daikon radish and sweet egg omelet). For those after heartier fare, Blue Fin offers delectably priced lunch specials ($10-12 for a sushi set) and fish rolls (all under $10). Don't worry about sacrificing quality or ambience for cost. Floor-to-ceiling windows and a selection of sakes sets Blue Fin apart as a date-friendly alternative to the Asian cafes that share its space in the Porter Exchange Mall.