Re: Crystal Cruises
You might want to try Radisson Seven Seas Cruises. Their cruises are Country Club casual for Alaska; no tux or jacket required (although I would take sports coat sans tie). Alas, they don't have SFO rt like Crystal. They do have an 11 day sailing on 9/10 Vancouver to San Francisco for 11 nights.
I think you will find Crystal to formal and staid (I admit I have never sailed them). Still fixed seating and you pay for all of your beverages.
"The test of a first rate intelligence is the ability to hold two opposed ideas in the mind at the same time and still retain the ability to function."
F Scott Fitzgerald
Seven Seas Navigator (12nts) - San Francisco - Vancouver - May13
Silversea Silver Explorer (23nts) - Kangerlussuaq, Greenland - Nome, Alaska - Aug 14