Good news on the dining front for Rockville Town Square: Four new Asian restaurants are on the way. Friendship BBQ, featuring skewered meats and seafood dishes, will open this summer across from Sushi Damo. And the former Mellow Mushroom space, empty since last fall, will be divided into three new eateries: Gyuzo Japanese BBQ, offering sake and tabletop grilling; Kyoto Matcha, serving green tea, cakes and other desserts; and Taro Cents Family, specializing in Taiwanese taro balls. Rockville Town Square and the surrounding area are already home to a number of Asian restaurants, from the upscale Peter Chang, Sushi Damo and Thai Pavilion to fast-casual Pearl Lady and busy food hall The Spot. Meanwhile, Little Dipper Hot Pot House and the adjoining Lab Cafe recently closed on Gibbs Street.