G1 Group, the Glasgow-based pub and bar operator led by Stefan King, is spending an unprecedented £5.7m on a dramatic transformation of its flagship venue the Corinthian. Set to reopen at the end of August, the five-storey, 1,600-capacity site will feature a walk-in casino and private gaming rooms, plus a variety of themed bars and a basement nightclub. More than 200 staff are being trained for the venue, which is described as “15 pubs in one”. The centrepiece restaurant will remain under the famous glass dome of the Grade A-listed 18th-century building that previously housed a bank and Glasgow’s High Court. David McDowall, operations director, said: “In our 10-year history this is the biggest project that we have ever worked on. The idea is to extend the night out into gaming and clubbing all under the one roof. “There will be nothing else like it in the country — probably nothing in Europe. G1 has expanded steadily to 43 managed outlets — including two cinemas with bars — running alongside 110 tenancies in the Iona Pub Partnership division.