razz around/a kind of go

Bon asked the inevitable question: Do you know where I can get some pot? I’ve got a bottle of whisky. Where are you living?’ And so he turned up at our plac and we smoked a lot of hash and drank some whisky and razzed around a bit. He was saying AC/DC were doing great stuff and it was all kind of go. Everything was happening.’

1. What does razz around mean?
2. What does all kind of go mean?
3. What was happenning?