The Rock Bottom has one of my favorite Happy Hour spots in Seattle. M-F from 3-6 they have $3 pints and wells. The happy hour menu includes burger and fries, calamari, pizza, and quesadillas (There is also a late night happy hour menu). If you are a member of Mug Club, you get happy hour beer prices all the time, plus your beers come in a 20 oz mug rather than the standard 16 oz. The beer is decent. My favorite is the Rain City Red, but there is always a seasonal/specialty brew on the menu that is worth trying.
This place is often crowded, especially the outdoor patio in the summer.
For those looking for a decent meal, this place has above average Pub/American food. I have tried the burgers, salads, and fajitas, and have been pleased with it all.