Tight budget, full plate in Portland
The Porthole (20 Custom House Wharf, 207-780-6533, www.portholemaine.com) is a retro, unfussy dineresque joint hanging over the harbor. Think faded signs, more-faded linoleum, an old pot-bellied stove (replaced by a far more efficient gas one), an upright piano, hospital-green paneled walls, a counter full of salty character (and often, characters), and a pooch-friendly deck. Always popular for breakfast, it also serves lunch and, in summer, dinner. You cant go wrong with the $5.95 Shipyard Beer-battered fish n chips, especially on Fridays, when its the all-you-can-eat special.