Upstairs on the Square in Harvard Square will be celebrating the bountiful summer and its produce with a vegan cocktail party this Thursday, July 18. Guests get to indulge in passed hors d’oeuvres and small bites such as vegan “Hot Dates” - Medjool dates stuffed with Marcona almonds - along with crispy vegetable tempura with ginger sauce, other savory bites and vegan chocolate cupcakes with raspberries. A glass of complimentary bubbly will be included. The event will take place in the festive Zebra Room or outside, weather (and non-heat!) permitting (6-8 PM; $45 617-864-1933).