The NRT lounge? Unless newly redone, don't get there early for it. Decent selection of food and drinks (a veritable feast compared to the AAdmirals Clubs in the US though), a few computers that may or may not be virii-infested at the time, quite a bit of seating, but otherwise it's a yawner.

No bathrooms, no showers. As a Ruby (SL means Silver, yes?), you won't have access to the Admiral's Club (I don't think). CX may have an arrangement with the AA club however.