The Northwest option. The relative comfort of First Class makes it worth it. I'd go to the WorldClub, get kicked out, then go to the P Club and be welcomed on account of the fact that I was flying their partner airline.
Actually, I'd probably get kicked out of the P Club too, so I'd buy a day pass or beg.
The one I'd rather die than do: Shuttle by United. A painless 1 hour flight, weather in LA, now a horrific 5 hour flight!
BizJet