FRIDAY

The 610 Stompers step out at their annual fundraiser, the Sweet 610 Debutante Ball, with food, drinks, entertainment and costume contests (1980s superhero attire encouraged). Benefits the Youth Empowerment project. 8 p.m., Mardi Gras World, 1380 Port of New Orleans Place; $60 at the door. 610Stompers.com.

FRIDAY, SATURDAY AND SUNDAY

Learn about the latest in nutrition and equipment Friday and Saturday at the Ernest N. Morial Convention Center, at a free health and fitness expo kicking off the Rock ‘n’ Roll Marathon. The marathon, half-marathon, and relay start at 7 a.m. Sunday at Poydras and Camp streets and finish at Roosevelt Mall in City Park. runrocknroll.competitor.com/new-orleans

SUNDAY

You’ve earned it: King cakes, both traditional and not-so-much, will be available for sampling at the second annual King Cake Festival in Champions Square outside the Superdome. Music, tastings and a vote for the best pastry are the proverbial icing on the cake. It all benefits babies and children at Ochsner. 11 a.m.-6 p.m. kingcakefestival.org.