If you're still wondering about places to go to replace G+, I wanted to suggest coming over to a Friendica system, which is in the Fediverse (it includes several different social platforms).
I've got a node here: https://social.isurf.ca
Drop me a line if you have any questions. Otherwise, hope to see you there!
That said, we do have an integrated chat system on the iSurf Social platform, which you can use with either a standard XMPP client (such as Pidgin, gajim, or Conversations for Android or Xabber for Android - there's IOS apps too), or if you'd like to test/try out a web-based chat client here, which I'm going to have some discussion with the developers on replacing the old unsupported client with, please give chat.social.isurf.ca a try. It's a rediculously simple setup, nothing fancy. You use your social.isurf.ca username & password to login in to it.
If you would like any further information on how to use any of the other clients I mentioned, please let me know!
#XMPP #friendica #chat #webchat #jsxc