Play casino games at Grosvenor Casino in. The new look casino features a private bar which offers live performances seven days a week from 8pm - 2am. Visit www. Cocktails start from just £! Discover more about the casino facilities, food and drink and more at Grosvenor Casino Gunwharf Quays, Portsmouth. 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. The Grosvenor Casino at Gunwharf Quays has an a la carte restaurant and a bar open from 12 noon to 4am. Featuring its own in-house DJ and. .