Maybe there is hope to avoid extinction and for things to improve. I can't predict the future any better than anyone else. But almost every climate prediction made so far has turned out to be optimistic including those published by the IPCC. We are entering an era unprecedented in human history. The latest paper from James Hansen states that "Eventual global warming due to today's GHG forcing alone -- after slow feedbacks operate -- is about 10°C." And that's if we stop all emissions today. The earth hasn't seen temperatures like that for something like 40 million years. We're more resourceful than any other creature in history, so it's possible some of us will survive. But life will look nothing like it does today.
And I think it's too late for Florida in any scenario.
There was a support group in an area I used to live in. It vaguely included NTHE in the name. And frankly I might have been better off if I had never participated. I did get to talk about my feelings on climate change, so that was nice. But the drama and infighting was unreal for a group with the ostensible purpose of discussing the likely upcoming extinction of our species. I suspect the topic was so far outside the Overton window it just attracted people accustomed to being on the fringe. Even the one or two we made friends with were too unstable to maintain a friendship.
So I recommend against describing your social group in terms of doomers, or extinction, or anything that will seem like too much for most people to accept. If I wanted to start a social gathering of some sort I would maybe make the focus on climate change or prepping or something that more people can consider realistic. Then just try and get to know the people who show up. Odds are some of them will have similar views and be looking for people they can talk with.
Of course I have also introduced the concept to a few open minded people who took it seriously and have embraced it (so far). That's another approach. It's pretty obvious something is different now and things are getting worse. There are some people who don't know why and would like to. It's a crap shoot though. Many (especially parents) just can't deal with it. But some can. So if you can have a real conversation with someone you know, give it a try. Talk about James Hansen's projections, or how we can't fix the climate damage we've done, or whatever your thing is and see how they take it.