When should the bride and groom walk the room at the reception?

[owlpost4you]

My fiance and I are not planning on having a receiving line but plan on "walking the room" to greet our guests that way. When is the best time for us to do that? Please answer soon, my wedding is in two weeks (June 27, 2009)!

 

[Monty]

I'd go around 2 or 3 times through the reception. Near the start, middle, towards the end.