on local colour

What is local colour? Local colour is when a glassy-eyed ancient hobbles across the Starbucks around closing time, her knees buckling with the effort, and hollers at the manager as loud as she can “Gerard! I’ll boot yer arse ye cheeky wee bastard.”
To which Gerard hollers back “Gerard! Meh meh neh meh neh meh neh.”
And all the staff, including Gerard, giggle and clap the old lady on the back.