I realize Valentine's Day is the worst night to go out to dinner (especially at this late date), but I'll be in SF for work and want to meet up with two friends in the area (but not from the city). Any thoughts on a fun, $ - $$$ priced restaurant that doesn't need reservations? We'll do dive, but we'll also do a scene. Nothing too quiet and stuffy. Will be staying in the Union Square area but willing (and would like to) travel to another neighborhood. (Nothing more than a $25 cab ride?) Many thanks.