I don't think they have a per charge rate. From what I was told you just have to pay for a bigger cake and more wine if you want to. That's why I picked RIU because at other resorts it was like $30 per person after 8 and I thought that could get a little expensive. It also doesn't make sense that they would charge you that much extra when those people are staying at the resort. I figured at 30 people, I would have to pay an extra $1000, that's why I chose RIU. Also, when I questioned about extra people they didn't say anything about a per person charge, just that we would have to upgrade the cake and wine if we wanted to.