Standup things to do in New York

Hey folks,

Not sure if this is the right place, but couldn't think of where else to ask.
I'm visiting New York for a month. Wanted to try and experience as much stand up related stuff in NYC time permitting. So my questions were:

- what places/clubs should I go to watch comedy? Any obvious recommendations?
- how to find out open mic places in NYC? I'm from Australia and have gotten up on stage twice. So pretty damn green. Thought I'd go watch an open mic or two and maybe even get on stage if possible. Any recommendations of open mics to go to for someone pretty new to this scene?
- any stand up or improv class/workshop that anyone would recommend? I know these are not looked upon favourably but I would be doing it to meet people rather than anything else.

Thanks in advance!