recently I and @suchisthesach have been trying this and this work wonders , last time we did this , I was in continuous flow of 90mins of studying and wasn't distracted at all. My friend stood as an accountability partner and I did the same for him. We sat on different tables to minimize distractions and working on our own. End of the productive session , we had a nice chat with hot tea and some sandwiches. We want to continue doing this once in a week , the only downside is eating out.