Working in a building next door to King Taps I'd been bound to check them out. Love love love the beer selection. There are options aplenty! Less love for how busy it gets at just about any hour on a weekday. That being said I've never had an issue getting seated when going with my girlfriend (i.e., just the two of us).
The better deal with King Taps is to go on a weekend. The Financial District is kind of a ghost town on Saturday/Sunday (which is super refreshing when you see how bonkers it is every other day). And they offer discounted drinks and food special on weekends. Plus, when we arrived there was live music from an acoustic performer which was a great treat.
If you love beer get a flight - there are several options to choose from. If you love pizza, try theirs. The pizza is a bit overpriced but the beer is average priced. On a Saturday afternoon while the crowd is almost nonexistent it's a great spot. On a Friday night it's not the best choice if you looking to escape the craziness of the bustle of work.