Confusing advertising

I walking past a church that was advertising "A night of worship and fellowship. All invited."

I wondered if this would appeal to nonbelievers. Furthermore, would they even realise what the event would include?

What does someone who isn't church literate think that worship is? Would someone with a decade old, negative memory of boring hymns, be attracted to this?

What about fellowship? This word is never used outside of the church (and even most Christians will give you a variety of definitions). Is it casual, over tea/coffee, chit-chat afterwards or deep sharing get-to-know-you's?

Now, i don't want to discourage the church form advertising events that they are doing. But if the ads are full of Christian jargon, is it overly effective in reaching outsiders?