In this case I would create a single Bank containing 3 loops (one for intro, one for verse and one for chorus). The Yamaha format allows ths (up to 8 loops in a singla bank if I am right). This way, each song corresponds to a bank.
Getting the whole song in a single loop is doable as well, but you sometimes feel prisoner of your structure (the ending comes and you would like just another chorus !).
In the yamaha keyboards with Chord Looper, it's easy to recall (load) one bank and go from one loop to another in the same bank. It is also easy to associate a loop to a registration item, so various loops get associated (and started automatically) as you move from one registration entry to the other (using a pedal !)
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