Best Sit Down Hamburger with a Full Bar
I would like to find a place with a bit of panache that has a really good to great hamburger and great french fries and offers a full bar. Since I am staying in the Union Square area I can spread out from there.
NoPa fits the bill...great food, amazing drinks, full upscale bar, but it can be absolutely awful to get a seat at the bar as a walk in (it's a cannibalistic madhouse for bar seating), but you could try to call the day of to get on the unadvertised list for seats at the "chef's bar" or whatever they call it that's got a view of the wood-fired oven and kitchen in the back of the restaurant.
Strange as it seems, O Izakaya Lounge in Japantown fits the bill perfectly. The restaurant has a full bar, and the best darn hamburger and fries I've had in SF. Other places to consider - Namu (although their burgers include some unusual condiments) and Custom Burger Lounge (a little odd, but interesting and long list of burger options).
439 Balboa Street, San Francisco, CA 94118
O Izakaya Lounge
1625 Post Street, San Francisco, CA 94115