Valerie Mamone-Werder walked K Street Mall on a wet morning last week. Wrapped in a black trench coat, Downtown Sacramento Partnership's new retail recruiter didn't seem to notice the dark clouds bulging with the day's next rainstorm. She seemed too full of excitement. "I love all these old buildings," Mamone-Werder said, standing near a corner of 10th and K streets. She pointed out what's happening near that important spot: the sophisticated vibe The Cosmopolitan cabaret, café and nightclub have brought to a corner once inhabited by Woolworth's, and the work under way nearby to turn a former Hit or Miss clothing store into Dive Bar and Pizza Rock. She also discussed the potential for t