The first venue we originally were going to book asked for 3500 and then a second payment a few months before the day, final payment after the wedding. The venue we went with asked for 2000, and final count and payment is a month or so before the date.
Honestly every venue is different. Every year venues change their prices. Our venue asked us a $3000 dollar payment to be able to lock in our date. And then another about half way before our wedding and then last payment after the wedding once final numbers were put through