6031 SE Belmont
Katie's trips to Cheese Bar have only involved the cheese plates, but those are always tasty so we're assuming their fondue is too. Their Fondue of Alpine Cheeses with Toasted Levain goes for $10.
115 NW 22nd Ave
Go for the happy hour Elephants Fondue for $3.95 with apples, carrots, and bread (hh is 5-7pm). Katie and I have a long history with Elephants and through our many adventures there this has remained a simple, but tasty staple. Give it a few minutes to thicken up for full enjoyment.
5035 NE Sandy Blvd
Usually Katie and I avoid bigger, multi-location restaurants but even though Gustav's has five spots now, it was started in Portland and they have good fondue so we're giving them a pass! My favorite- the Crab & Roasted Red Peppers Fondue ($12.95).
Allen DesignsUrban Fondue
2114 NW Glisan Ave
Disclaimer: we haven't had their fondue. Katie and I had an okay Bartini experience and then a very negative Bartini experience so we may have written it off. But here's the deal- it gets good reviews by other people, it's reasonably priced, its a good location, and I sort of doubt a fondue restaurant could mess up cheese fondue...