Perche

This is hard to reply to without some details. What part of Italy are planning on visiting, when, and for how long? Four couples is 8 people, "but a couple three," don't want to participate. Do you mean that 3 of the couples don't want to participate and this will be cooking class for 2 people?

Taking a cooking class in Italy is not about the cooking. You can't learn how to cook Italian food in a 4-6 hour class. You'll pick up a few tips, but it's mainly a culinary cultural and eating experience. Food is a huge part of Italian culture. You'll start with a walk to the local market, where you'll shop as a local, the instructor will teach you how to navigate a market, why and how they choose certain items and not others, etc.

You will then usually be in the instructor's home cooking a 4-5 course meal while drinking wine, with lots of laughter and entertaining talk about Italian food culture by the instructor, and much of italian culture is about food. Then, you eat what you have cooked. It's a way to experience authentic home made food and to eat in an Italian home experiencing the culture as a local, an opportunity that is generally not given to people visiting Italy.

It will improve your knowledge about cooking certain things like pasta (it's way overcooked 99% of the time in the USA at home, and in restaurants), and it will help you to make better choices when eating at a restaurant, give you some knowledge about what to choose on the menu, etc. You won't learn that much about cooking, because the cooking class is not really about cooking. It's more about the experience of participating in local culture, from the market, to eating in the home of an italian cook.

But it's not possible to provide any recommendations without knowing where you're going.