good manners and some sophistication go a long way in rio - simple gestures like holding a chair or showing up to a date with a small flower can make a wonderful impression.

cardinal rules and common courtesy such as opening the door for womem, of all ages, is appreciated, as well as opening taxi doors, and walking on the outside of a lady when on the street.

particularly if on a date, it is typical for couples or those on a date to walk hand in hand, or arm in arm, especially after dinner - cariocas are very proud of their appearance, and place a lot of effort in looking great - there is also something to be said about paying compliments to others. 

if something specific stands out on someone, it is always appreciated to point it out, everyone loves to feel special and noticed - playfully clapping or a light bow when someone is absolutely stunning or handsome, is a great way to keep the enviroment cheerful and make others feel great about themselves - positive energy is always a plus.