For me :
V.small venue; The Doug Fir Lounge, Portland, Oregon. www.dougfirlounge.com Capacity of ~300 and it's in use nearly 7 nights a week. I've seen CSS, The Wedding Present, Bob Mould, Kasabian, Kotche & Kline amongst others here.
Midsize venue; The Crystal Ballroom, Portland, Oregon. 1500 capacity. www.danceonair.com A wonderful place for shows and almost always in use. I've seen Robert Randolph, My Morning Jacket, Band of Horses, Madness, Dinosaur Jr. and many others here. Great beer too and an easygoing attitude re: taping & photography. Teh bouncers are very laid back too as long as you're not as ass.
Large outdoor : The Gorge Amphitheatre; George, WA. 20,000 capacity. Host to Sasquatch every year and Pearl Jam & Tool have played here in the last year. Wonderful natural amphitheatre with views out onto the Columbia River. Decent sound and there isn't a bad view in the place. http://en.wikipedia.org/wiki/Image:G...phitheatre.jpg
Over to joo !