Nearest underground station is Medborgarplatsen, use the front exit if coming from Central station. Take a left turn on Folkungagatan and walk up to no.126, that's where the On Inn is, restaurant Peoples. It will take you about 5 - 10 minutes to walk so plan ahead, the hash will start on time.
The restaurant wants us to pre-order food so be a little bit earlier if you like to eat.