Fruit salad with lime or lemon juice and chili sauce or ground dried chili. Yum! This is very commonplace in Mexico, so I can't claim to have invented it. Most people in this country seem to go "urgh!" at the suggestion but it's really very tasty.
Also, on a similar theme, cold lager with chili sauce, worcestershire sauce* and lime juice in a salt-rimmed glass. This is known as a "michelada". Delicious and refreshing on a hot day.
* known as salsa Ingles ("English sauce") in Mexico