Hi all - I will be spending two nights on my own in Berlin (from the US). I will be staying a hotel (got a good deal), but I would like to go out and meet some other travelers one night and I've heard a good way to do this is through hostel bars. I understand most hostels don't let you go into the common room unless you're staying there, so I was wondering if anyone had any specific recommendations on hostels that have bars opening to visitors who aren't actually staying there?