business meetings in rio usually begin with lighter conversation, and appearing to rush things can make the visitor come off as rude or uninterested in getting to know the other party- that being said, it is important that the host initiates serious negotiations, and small talk or introductory dialogue is not abruptly interrupted.  

it is very important to remain non-confrontational and avoid criticism with topics such as politics, and social situations, unless related to business - keeping a positive attitude will earn the respect of the hosts while praising the admirable aspects of the city will be well received.

a strong part of the nature of many cariocas is that they like to act promptly, with a great capacity for reviewing set plans, identifying solutions to problems quickly and efficiently, and improvising if necessary -  due to this cultural charactieristic, and cariocas understanding of the global markets unpredictability business deals might be organized on a shorter time frame.