Yes, South America is usually much less expensive than say, crazy Sydney. But when I am organizing a group dinner, pricing and value really make me more careful than I would normally be. On Trip Advisor, some comments were that it was really expensive, and that is really in the eyes of the payor. Many of those critics are from BA, and to them, it may be expensive and to us it is reasonable, but I never saw prices. I'm sure you all will have a great time! This is not a group that is going to quibble about paying $10-20 more per person for a fun night.