She means they're all going to mince down Old Compton Street together.
(
rnuk http://flickr.com/rnuk, Fri 17 Jun 2011, 14:55,
archived)
They never invite me to mince down Old Compton Street with them anymore.
(
baldmonkey a frothy foul-smelling vaginal discharge, Fri 17 Jun 2011, 15:06,
archived)