Yes! It's delightful!!! What i find is that there are soooooo many who are hungry for God and may not even realize it, and then they notice you and yer party praying (not loud, just conversationally...not to attract attention, but just in a very natural way) they come over and ask, praise God!
I don't believe there are ANY "accidental" meetings of anyone.....i believe it's arranged by God Himself. We are "witnesses" regardless of where we are, or what we're doing. God is WITH us. He's never back there on a "shelf" somewhere. He's HERE, right in the HERE and NOW.
It is HE Who moooooves when someone sees us giving him thanks at a restaurant, etc.
He is GOOD. He is to be praised and given thanks.