I own a small B&B in San Antonio Palopo which is about as Gringo-free as you can get on the lake. I would be interested in hosting a get-together for folks who actually have interest in/care about Guatemala. I don't have a specific plan but this could be a free afternoon get-together or possibly something where people want to stay overnight.
What I can offer is a terrace with an amazing view of the lake which would be a great place to chat about, well, whatever. Beyond that, we could do a dinner or ???
If you are interested, let me know. I promise the view will be worth the trip.