On Wednesday night, atUnderground, The HHI, a group of revellers was seen dancing to some House andBollywood remixes. We spotted a group of foreigners who were in the city toattend some activities by an NGO. Thoroughly impressed by Kolkata���shappening nightlife, one of them said, ���We���ve visited nightclubs inMumbai and Delhi, but the music and ambience here simply rock.���