Grosvenor Casino is the self-heralded "Most Popular Casino Brand in the UK". The online casino features an impressive repertoire of virtual casino games. Grosvenor bietet die besten landbasierten Casinos aber können sie es auch Online bringen? Lesen Sie unsere Bewertung von Grosvenor Online - Casino. Established in , Grosvenor Casinos is a UK-based chain of 55 casinos located in major towns and cities across the UK, with two unbranded sister casinos located in Belgium. Grosvenor Casinos is owned by The Rank Group who operate exclusively in the casino, bingo and online gaming industries across Number of locations : 55.