There are a couple of sites you can lookup or subscribe for alerts:<p><a href="http://startupdigest.com/events/" rel="nofollow">http://startupdigest.com/events/</a><p><a href="http://lanyrd.com" rel="nofollow">http://lanyrd.com</a><p><a href="http://www.eventbrite.com" rel="nofollow">http://www.eventbrite.com</a><p><a href="http://www.meetup.com" rel="nofollow">http://www.meetup.com</a>
They are everywhere. Go to a place where people are working on interesting things and there will be plenty of invites. I would never go to FB group, meetups could work depending on the city.