About a month ago, I encountered several JWs at a literature cart in a major airport.
They invited me to the Memorial.
I just rushed off to my plane.
Later, I kicked myself for not doing some reverse witnessing.
I could have said: "I actually attended a Watchtower Memorial once but I found it really confusing. Who invites someone to a meal and then tells them they aren't worthy to partake? When Jesus instituted the meal in the first century, did he invite any non-participants to come and watch? No. So why does the Watchtower do so?"