The UK operator of TGI Fridays has gone into administration, placing 4,500 jobs at risk.
A total of 87 of the chain's restaurants have been put up for sale as owner Hostmore, a hospitality company, struggles with debt and heavy losses.
It hopes to complete a sale by the end of September, which would keep the brand running and help to secure jobs.
Hostmore said the American-inspired chain "continues to operate normally and all existing stores remain open".