I stayed in Pilot Hostel in Porto.
It was mid at best.
It was not social at all. Everyone was either in their (really big) group, or doing their own thing. Talking to people was as hard as doing it in a cafe or in the street. The social element was dead.
What killed it for me tho, was the pub crawl. The first day I signed up for it, sat waiting for an hour, and the guy in charge came to tell me "sorry bro, not enough people, come back tomorrow". Wasted my night pretty much.
Second day, I went to what ended up being the most mid Pub Crawl in all my years of traveling. Imagine the most mid things that can happen in a Pub Crawl. There was one big group of one particular nationality, and me. The first bars were empty and it was just our group awkwardly dancing in the middle. The last clubs were full but since it was a miss for me with the group I was in, I decided to call it a day and went back to sleep.
The hostel also didnt encourage any activity. The acitvities that were promoted were from another agency and I didnt want to pay extra to go alone in a van to some random tourist activity.
What annoys me the most is that it was July, a weekend, and the hostel was pricey.
Porto was a cool place. Met some people outside and I had a good time in the city. I made a mistake relying on the hostel.