We did not have Brazilian tour groups, but we did have the Argentinian Tour Groups. There had to be at least 200 of them and there were all with the "Fifteens" group. Chanting and doing crazy things until at least 11pm every night. So basically the whole resort was filled with girls that were high school aged during the trip but I hadn't realized that it was a two week competition. I noticed the cheerleaders start coming in on Wednesday/Thursday and saw many leave on Monday/Tuesday (And saw the white "National Champion" jackets on Sunday and Monday) so I figured it was more of a long weekend thing.
I could deal with the cheerleaders and their families; they are at least pleasant and respectful. The only draw back with them there was the breakfasts. The Argentinian group I could do without though I will say they were better than many of the Brazilians groups I have run into. I couldn't imagine being a hotel cast member dealing with all of the South American groups on a consistent basis.