Photograph the field together, the location is not important
Activity 1: Outing. Take photos of the countryside together. The location doesn't matter. You can choose one of your shared apartments or a room and make it look like a paradise island, or you can choose a paradise island. But share vacation days. You'll get extra points for every laugh you let out when Antoniu, on duty, tells you: "And you'll have to put up with it, so many women together all these days?" Take photos of yourselves drinking daiquiris with or without alcohol. Send them fifty-three times "by mistake" to all these narrow-minded Antoniuses. Don't apologize.
Activity 2: history of cinema. Watch together Thelma and Louise. Get in a car to go to the beach, to the ratafia fair, to a cocktail bar to dance country music, or wherever you feel like it. Drive. Every time a testosterone-fueled Antoniu passes you on the right, sticks himself in your face, looks at you impatiently while you're parking just to get on your nerves, or makes vehement gestures with his arms accusing each other of respecting the speed limit, roll down all the windows at once and brandish a lighter each. From here on, the activity is free and you receive extra points for pyrotechnic creativity.
Activity 3: Historical memory. Using the lighters from Activity 2, light a bonfire on a beach where it's allowed. If that's not possible, replicate the scene on any terrace or balcony, with some "borrowed" sand from the playground near your house and a small camping gas stove. Remember the times you've saved each other's asses without judging each other, the times you've endured battles about boyfriends, love, affairs, or forgettable relationships without judging each other, the times you've endured others quitting smoking or relapsing into smoking without judging each other for being white liars, the times you've acted with Sicilian loyalty toward someone who has hurt one of you (and there's no need to judge each other here, it's just that, and that's it).
Activity 4: The Voodoo Doll (crafts). Illuminated by the bonfire from Activity 3, create a voodoo doll-style doll. You'll only need scissors and a scrap of any fabric, and if you're not good at sewing, you can staple the clothes together (as told to you by a non-sewing expert). Where the face would go, glue a photo of some sexist bastard who played a dirty trick on you. Explain the dirty trick to your friends. Throw the voodoo doll into the fire while everyone calls out the witches' favorite line from Act I: "Up, up, through the fog and the foul air." If anything happens to any of these sexist bastards later on, our lawyer says it's pure chance and all that. Just in case, raise a glass.
Activity 5: Agenda. Book next year's vacation together.
Long live summer and long live life!