Good,but....
When we first arrived ay the meeting point, it was unclear who we were meeting. We had to ask around. Once we found our guide, she told us to go to a table in the basement and she'd come to us when the tour started. It took about 45 min, then she said we were at the first location and should relax, eat one of the tapas choice and drink. The bar was having open mic night. It was nice. This bar was British. Everyone speaks English and Spanish in Barcelona.
We finally moved on to the next location... it was fun. Really good drinks. We only got an hour there. Each of the 4 bars gave us a shot for free. There was no food at any of the bars except the first one. If you're hungry-eat something there.
One of the bars we went to was awful. There was no seating, it was tiny, dirty and it was in a drug-heavy location. A few of the attendees and the even the guide participated in that stuff.
The group was definitely young.... my friends are over 40 and everyone else was in their 20s, very drunk, very loud, getting in arguments, etc...
The club was nice. Very, very large and super crowded. There are a couple of different rooms with other genres of music.
Tips:
-Bring money for drinks if you want more than the few they give as part of the package.
-Wear shoes you don't care about because you will definitely be in some dirty alleys as you're walking to the bars. Many streets had poop on them as well as urine.
-Keep your money or valuables inside your clothes. There are lots of pickpocketers and 2 people are robbed during my bar- hopping experience.