The rooftop terrace on the 21st floor of the new AC Hotel is opening as this bar and lounge with a Spanish accent. The hotel's ground floor restaurant, Boqueria, also evokes Spain. At Castell, the featured cocktails are martinis. Other drinks are grouped according to style, like shaken or stirred. On the culinary side are toasts, snacks like crispy sea-salt potatoes, salads and larger dishes, including chicken skewers and a flatiron steak. (Wednesday)
260 West 40th Street (Eighth Avenue), 929-284-3741, castellnyc.com.