Lots of fun places to visit in Portland. More than I can list.
As for bars, you might want to check out The Secret Society at http://www.secretsociety.net/lounge
They are right next to a great tapas restaurant, Toro Bravo, at http://www.torobravopdx.com/bar/
For rum cocktails, you might want to hit Rum Club at http://rumclubpdx.com
Also, the Irving Street Kitchen is pretty delicious and they have some good cocktails. Their site is at https://irvingstreetkitchen.com
Punch has some more good recommendations here: