The best place to drink wine in Oregon? Your house! Here's what you do: get a group of friends together, decide on a theme and everyone brings a bottle.
If you want to get really dorky, do some research, study the region or grape varietal first. Good sources are Jancis Robinson's Wine Course and Sotheby's Wine Encyclopedia.
Use some wine periodicals or newspaper sections to help you decide on a theme. Lettie Teague is a great writer for the "Off Duty" section of the Wall Street Journal. She recently did a great piece on the unsung Muscadet from the Loire. She provides spectacular suggestions and background of the grape. Wine Spectator always has good suggestions. Travel to South Africa in a bottle! Also check out their recent article on drinking wine in Portland.
Uncork some bottles, take some notes on swirling, sniffing and sipping. It also always fun to select winners and runners up.