Looking for a late finish venue?

Hi There, I am marrying a beautiful Argentinean next year. We are trying to blend the 2 cultures with our wedding but are finding it very challenging. One of the key cultural issues is the finish time of the weddings - there weddings finish at 6-8am (no joke) and ours finish at 11pm! At present we are trying to find a venue that can host us till 2-3am. (150 people) - with a later start as well. Any suggestions!? Thanks!