My grandfather was a preacher.  Do you know any preachers?
I do not know a few! Which religion does he worship?
He was a Christian (non-denominational) preacher, but his father was a street preacher in an old horse driven carriage.
Oh that sounds awesome! A horse driven carriage? Do you have any stories about it? I would really love to hear!
It was pretty cool - I wish I had more stories from him.  I have a bunch of pictures of him and his carriage.  He always had Sunday morning services right on the street in downtown Victoria, BC.
That sounds wonderful! I can't imagine how amazing the fresh air and sunshine felt while hearing his sermon! 
I know, right? I suspect that most cultures have preachers and outdoor services.  It's just us Americans that bring it inside.