Great way to meet many fellow travelers and even some locals. As mentioned they had pizza, beer, and wine at the first bar. After that we had a shot at each bar we stopped at and ended the night at a club that had a decent number of people for a Tuesday night after all. A couple of the bars we stopped at had beer pong tables. From talking with locals Thursday night is ladies night out and Saturday night is the most popular day for the pub crawl.
This is a great way to get to know the night scene in BA. They aren't joking when they say that no one goes out until 1am though!
For the younger set. Or a mom/dad with their adult kids. My wife and I felt out of place but everyone was nice.
Very very very overcrowded. These bars werent actually even in operational hours so you just mingled with the others in your tour group. Young crowd, so avoid this if youre over 30.