Weddingbee boards

I think it depends on how often you want to refill them.  :)  Let's see, a 7 quart chafing dish holds 50-60 servings.  So you'll probably want at least four 7 quart chafing dishes for the sides (2 dishes for each side) with plans to fill each one up once.  Depending on the size of your meat portions, I would probably rent at least two, if not three, 7 quart chafing dishes.  You'll need to fill up the meat dishes probably 2 times (or more, depending on your cut sizes).