Can we rank the bars at the various SF Marriotts for ambiance, hours available, etc?

Thinking specifically of:
Westin St Francis
Palace
Le Meridien
Marriott Union Square
W
Clancy
JW Marriott
Of these, I've only stayed at Le Meridien and don't remember much about the bar

I am in SF for a convention in November, staying at the Marquis. I am thinking about booking two nights the weekend before at a Marriott property. Boutique hotels with good scenes (1 Hotel, etc) are at $600 a night, Marriott hotels are at $200 a night, I can't justify paying for the better ambiance properties (also want to burn a 50K cert).

I am thinking Westin St Francis as I will now be able to take advantage of the breakfast Buffett (Thanks Bonvoy Brilliant) and the bar seems well reviewed. I could also just walk over to Hotel Zelos one day and go to 1 Hotel the other day and not rely on the hotel bar...