if your lappy craps out, or you are just too lazy to bring out your lappy and set it up.... with a bit of pre production, the same set can be played on CDs:

step one - render every tune from your ableton set at the same bpm.

step two - burn CDRs of these tunes at said bpm

step three - turn up to a gig and mix like the master of all CDJs (even on shitty old CDJ's!)

step four - tell no one what you have done and play it off like you just been practicing on the CD decks for a long time...

this is handy for squats and bars...