Bongo Room or Yolk?
On a Friday, there should be no wait at either place; there are only crazy waits on Saturdays and Sundays. (Note, July 5 may be an exception, because of the holiday the previous day.)
I would lean towards Bongo Room as long as you enjoy sweeter dishes; they specialize in creative pancakes with sauces, such as their pretzel pancakes with white chocolate caramel sauce. Tip: Their standard portion size consists of three GIGANTIC pancakes, but you can also order one-third or two-thirds portion sizes at reduced prices, which makes it easier to try more than one dish if you like. If you don't enjoy sweeter dishes, I'd lean towards Yolk.