So this might be a bit confusing to explain but here goes.
I've said this before but just for clarity - We are having our wedding in Paris where we live and then having a 'smart casual' lunch in Australia to celebrate our wedding. It's not a second wedding. So We've decided to have a second card in our invitation suite (is that what it's called?) with the info on it.
But I'm not sure about wording for it I have so far (what is on each line is based on the design of the suite so I can't really change that. 
Please join us for 
Lunch
Saturday 
11 . 11 . 2017 
The Bridgewater Mill 
address
I'm worried that the 'Please join us' isn't clear that is a celebration but not a wedding. 
Any ideas are welcome.