Sessions, etc, in Seattle early March?

I’ll be heading cross country for the Friday Harbor Irish Music Camp early next month. Since I’ve never been to the Pacific Northwest before, I’ve booked myself in for a couple of days in Seattle prior to the camp. I’ll be staying at a hotel in the University District and I’ll have a car. Can anyone here give me tips on good sessions or other stuff happening in Seattle from Saturday March 4th through Monday the 6th? I’ve already heard about the South Lake Union Irish Festival on Sunday and plan to hit that. Anything else going on then?