Anonymous. I find it easier if I learn a group, then another. and so on. This way I can if I like, do the last group first and the first group last. I've never been in a position where I have to start at A and go through to Z. This means I can start on the short end of the floor, or in the middle of side one if I please. This applies to Latin or Standard. I've seen couples that if they get stopped they have to restart at the beginning. Another guy told me he can go around six sides of a ballroom and not repeat once. Which I believe is stupid.