There once was a time when replacing the letter S with Z, and C with K, was cool. That time was 1991. In those rubbish annuals you used to get at Christmas as a kid, like Sonic and Dr Who.
Cut to East Dulwich in 2009, and here we have the newly opened Klassy Fish Bar. It's so new in fact that it's not on Google Street View - according to @owenm who snapped this suave sign, it used to be a Codfather. Yup, that's right, ANOTHER Codfather.
Thanks Owen, keep it klassy.