Downtown Rockville has yet another new option for ramen and bubble tea: Side-by-side restaurants Yamachan Ramen and Pearl Lady opened their doors last week at 201 E. Middle Lane. This marks the first U.S. location for Pearl Lady, a popular Japanese chain offering milk teas, matcha teas, green teas and frappés. There’s no shortage of the bubbly stuff in downtown Rockville, which already is home to Lab Cafe on Gibbs Street, Kung Fu Tea on North Washington Street and Gong Cha inside the new Asian food hall. Can one neighborhood really sustain all that slurping? We expect some fallout in the next 12 months.