Bob's website states that his show at POR is still going. His calendar states that he's going to Uzbekistan after his Wednesday show this week, so the next show after his Wed. 4/30 will be on Wed. 5/14. Looks like all shows run from 8:30pm - 11:45pm.
Also, the website has a 'send message' function if you want to tell Bob you're coming.
Yes - the lounge is called River Roost. It is just off the main lobby, to the left from the front, just next to the store. There is a section with tables near the piano (plus the actual bar) and more tables behind a short divider wall. Then there are some high tables and soft seating closer to the entrance, though yoru view wouldn't be as good from there. If you want a clsoer seat it is best to get ther early.