I made the mistake of bringing M44s to a gig where everyone played Ortofon bananas. I tried adjusting the tonearm a bit but the next DJ had trouble re-adjusting back to the bananas after my set. For regular DJs, I suggest always having a pair of blues and M44s in case either style cartridge is being used at a gig. Then you don't have to do any tonearm adjustments other than maybe add weight.

I think it's much better to spend money on having both styles of cartridge in your bag then just buying Nightclubs or Shure Whites. Those are more for home use. Obviously if the club already spent the money on those higher-end needles, then its to your benefit, but good luck finding clubs or festivals with those.