The UK-based SFI Group , famed for its Slug and Lettuce bar chain, has agreed to acquire the high street chain of Parisa Café Bars at a cost of up to £15m. SFI will acquire 28 Parisa outlets and sites for development, all of which will be converted into the group's core brands. Re-branding the sites will to cost an average of between £50,000 and £100,000 per site, and the company expects to complete the conversions within the current financial year.