The crawl was awesome. We went to a few places in Itaewon, the 1st, 2nd and 4th places were right at the centre of Itaewon, only the 2nd place a bit outside, like 10m walk. The captains, Bear and Yoon, were extremely friendly and helpful. I came alone, but they made me very comfortable.
Don't expect too much of the drink at each bar; it's more like a single lemon shot. However, at 2 places, the captains gave a bottle to our group with a small celebration, which made us quite special. Overall, it is definitely worth it and recommended. Will come back!