Vincent knows that gambling is a good way to lose your money, unless you're cheating. He has had his fill out it and Aria looked like she enjoyed it too. "Best to walk away at times like these. How about we get a table and some drinks now." Vincent had no intention of getting intoxicated, not with a walking tornado and a bag full of gold. That would lead to all sorts of trouble, so he just waves over a waitress, and gets a simple ale. He let Aria order for herself.