This generally happens at a 'Hi [city]... Be Social' meet up. I launched the first one in Melbourne in 2011. The goal of these events is to Be Social. Step out of your traditional circle of friends and meet up with people from all walks of life. These meetups are always good fun, they kill assumptions and hold the opportunity of new friendship and yes even love ;-)
Everybody is more than welcome.
Help me organize a meet up in your city or go explore meet ups from the past.