Two-time Olympic Gold medalist in rowing Erin Cafaro and CrossFit endurance creator Brian MacKenzie will discuss training, diet and gear at the Lake Highlands CrossFit at Audelia and Walnut Hill from 11 a.m.-3 p.m. tomorrow, Saturday, Nov. 17. Stay after the talk for a workout and food. Cost is $10; RSVP to events@dallasunitedcrew.org.