Dragonfly Restaurant has closed its doors after five years in Midtown. Owners Glenn and Rosa Rivera-Lew quietly closed the Asian-fusion restaurant at least two weeks ago. They are now considering other options for the 3,500-square-foot space at 1809 Capitol Ave., whose lease they still own, said Ernesto Jimenez, an owner of the building and Zocalo, the restaurant next door. Dragonfly — whose menu included sushi, noodles and tapas such as sesame seed cones and taro chips — struggled for some time. "That's a sad one for us," said Rob Kerth, executive director of the Midtown Business Association. "I think they just couldn't draw enough people in to keep it going." Dragonfly opened about a