To join a public Google+ hangout is quite funny if you like to chat with multiple strangers at a time.
But how to find those public Google+ hangouts and join them? You can check out the following 2 web apps:
1. GglPls Hangouts
GglPls Hangouts is a Chrome extension for you to find public Google+ Hangouts which are happening at the moment or even which are scheduled to happen.
Besides, you can also enter your Google+ ID and add your public hangout to the list.
The GPhangouts website is also available for you to find public Google+ hangouts happening now or scheduled to happen. Besides to join others’ hangouts, you can also enter and share yours, so that other Google+ users can join you.
And the available hangouts list will be updated automatically every 5 minutes, but it seems that every text link is linked to the hangout host’s Google+ profile, not the hangout itself.
Besides GPhangouts, PlusRoulette.com is also a website for you to join public Google+ hangouts and chat with strangers, but I’ve never seen any available hangouts, though I can launch my own and wait others to join.
In fact, there are not so many public Google+ hangouts yet, and if you want to chat with more strangers via your webcam, check out these top 10 free online video chat rooms.