Green 'Saturday/Rooftop' Happy Hour

How about unbeatable weekend Happy Hour, just for our group, on a weekend night? This is mainly a social event and it is organized in joint with my other meetups. We usually draw a big crowed and you might want to get hold of me, at the event, to know, where the green group is. We invite guest speakers on our Happy Hours, from time to time. If you are interested to speak on any green and sustainable issues, please let us know. We will arrange a forum for you.