Play casino games at Grosvenor Casino in. Cocktails start from just £! Discover more about the casino facilities, food and drink and more at Grosvenor Casino Gunwharf Quays, Portsmouth. Visit www. . Featuring its own in-house DJ and. The Grosvenor Casino at Gunwharf Quays has an a la carte restaurant and a bar open from 12 noon to 4am. The new look casino features a private bar which offers live performances seven days a week from 8pm - 2am. If you want even more from your visit to Gunwharf Quays then there's Vue Cinema, Hollywood Bowl, a contemporary art gallery, nightclub and casino.