This weekend seems to cover all the bases. Love live music? See 80 bands during Adams Morgan PorchFest. Love tacos? It’s Cinco de Mayo, with specials at bars and restaurants. Fan of “Star Wars”? Participate in trivia and lightsaber battles, or watch the movies on May the Fourth. Have a green thumb? Washington National Cathedral’s Flower Mart brings plant vendors, floral arrangements and family entertainment. Curious about all those embassies you pass during your commute? Sixty are opening their doors to the public Saturday. Enjoy a fancy hat or mint julep? It’s Kentucky Derby weekend. Enjoy spending a warm night watching films under the stars? Outdoor movies are back at National Harbor. And that’s just the tip of the iceberg.