Martinis and cozy conversation mix well with quiet jazz at this mellow nightclub.. In Short It's easy to drive right past this destination on the corner of Humboldt and Water--there's no sign or address outside. The aptly named Redroom features handsome deep-red walls; romantic, diffused lighting; a simple bar and several small tables. The decor is modern, stylish and warm. Music is on the quiet side, with jazz, contemporary house and electronic. The vibe is friendly and low-key at this full-service cocktail bar.