He probably means 70-200mm and to do so you'd need to have at least a f/2.8 if not, a f/2.8 with IS.
One thing to keep in mind, and I understand this wedding is free, etc... but if this is a precursor to future wedding shooting, then eventually investment in faster lenses will happen and some wedding situations just aren't going to lend themselves to shooting without a flash. If going the fast lens route, keep in mind that shooting wide open most of the time means shallow depth of field, so only one face in your shot might be in tight focus while all others are blurred out (which, I know, might be the goal, but not with all photos. If you have any flexibility for moving around, then I don't see why the 60 would be a bad choice, what's that, 96mm? The 17-50 might be the route you'll want though, you'll want some wide shots as well.