It was a cybershot heard around the Cajun world when an email sent to Steve Riley and the Mamou Playboys’ distribution list in early February announced the retirement of the band’s David Greely. The fiddler’s last Mamou Playboy gig will occur on Mardi Gras Day in Eunice, Louisiana, capping a 23-year-run from when Greely co-founded the group with a then 18-year-old St...