Shabu Shabu in PDX?
Well, hot pot, the Chinese version of it can be had here, but I don't know about traditional/authentic shabu shabu.
I've not been to Beijing Hot Pot, but I used to frequent Hot Pot City and was rather fond of it. At HPC, lunch is less expensive than dinner, but dinner has a lot of seafood on the bar that is not available at lunch.
Hot Pot City
1975 SW 1st Ave, Portland, OR
Beijing Hot Pot
2768 SE 82nd Ave, Portland, OR 97266