When announcing/advertizing an in person meet-up, I am thinking that it would be important to state the basic underlying ideas of Epicurean physics in a paragraph with just a few sentences.
This will make it more clear as to whom would want to join. There is no need to appeal to those who on the one hand have religious belief that God created the universe and is concerned about humans (and feel that everything is according to God's plan). And on the other hand there are those who might have a "new-age/visionary/magical" take on the universe (and which might include things such things as belief in multiverses, or other ideas such as healing at a distance and taping into the vibrations of the universe, etc).
This basic paragraph should say: that matter at its most basic level of atoms and void is "semper existentia" (always existing).
And it also should say: that we observe phenomenon and then look for causes, and we don't jump to any conclusions too early - and most importantly we only look at what is part of current life and actual circumstances grounded in reality, and with a pragmatic approach.
This also brings up the question: that we seek to understand natural physics because we seek pleasure and the most pleasant life. But like the chicken and the egg which came first? (Over in another thread I started wondering if Epicurus invested more time into natural physics compared to ethics. But for the record, I am back to my original focus of seeing the ethics as being the primary importance).
Just thinking that anyone who ends up chasing theories like multiverses will end up so distracted that they may never make it over to study the ethics aspects of Epicurean philosophy.