Delectable doughnuts from Rose Ave Bakery pop up at the Hirshhorn Museum. | Rose Ave. Bakery/Facebook Plus, a boba shop rises in Georgetown, Calico hosts a fall harvest festival, and more intel. The Smithsonian’s famed “concrete doughnut” rings in 50 years this week with some actual doughnuts from local confectioners. From October 3-6, 50 free sugary spheres will be distributed at 10 a.m. to the first museum attendees in the Hirshhorn’s lobby. Photo by Salwan Georges/The Washington Post via Getty Images The doughnut-shaped Hirshhorn has sculptures around the circumference and a large courtyard in the center. The birthday party kicks off today with doughnuts from Rose Ave, Eater DC’s 2021 Bakery of the Year that stuffs confections with Asian flavors in Woodley Park. On Friday, Founding Farmers dishes out doughnuts starting at 10 a.m., followed by Astro Fried Chicken & Doughnuts and Just Fine Donuts’ vegan and nut free treats on Saturday and Sunday, respectively. The Hirshhorn’s resident cafe Dolcezza Coffee & Gelato celebrates with cinnamon doughnut-flavored gelato throughout the whole month. The contemporary art museum’s new Basquiat x Banksy exhibit is the latest attraction inside. Spot of Tea Colorful concoctions brewed by Spot of Tea. Half-priced tea at Georgetown’s new Spot of Tea The D.C. farmers market success story plants roots in Georgetown this weekend. Spot of Tea debuts a new standalone spot in the Grace Street Collective with bubble teas and toppings. In honor of opening day, get half-priced drinks from Friday, October 4 to Sunday, October 6 (11 a.m. to 6 p.m.). 3210 Grace Street NW One night in Lebanon The Wharf’s “enchanted garden” Ilili offers a special tasting on Wednesday, October 9. Chef Satinder Vij shows how Lebanese food has impacted global cuisines by taking diners on a journey to Morocco, India, France, and Mexico. The “Quest Through Spices and Flavors” menu includes a savory mushroom and black garlic eclair and a pani puri with sweet labneh cream and tamarind gelatin. Tickets ($150) are available on Seven Rooms. 100 District Square SW Calico Calico’s past annual fall harvest festival featured free pumpkin painting supplies. Calico gets into the seasonal spirit with pumpkins and beer This tucked-away bar in Blagden Alley puts on its 4th annual Fall Harvest Festival this Sunday, October 6, with pumpkin painting, caramel apples, cider doughnuts, and free beer tastings from DC Brau and Berlin-based brewery BRLO. Calico’s new fall favorites, like mugs of chili and mulled wine, are available for purchase. Get (free) entry on Eventbrite. 50 Blagden Alley NW Nobu marks three decades with a limited-time omakase menu Take a time machine back to the early days of Nobu with a special 30th anniversary menu at D.C.’s West End location. The week-long omakase deal ($130) showcases some of chef Nobu Matsuhisa’s first dishes and the stories behind them. That includes toro tuna tartare topped with caviar, salmon tataki, tuna sushi with fresh wasabi, a Japanese red snapper salad, white chocolate and shiso ganache, and more delectable bites from Monday, October 7 to Sunday, October 13. Reservations are available on OpenTable. 2525 M Street NW