It depends. Which resort are you interested in? I believe the Poly and CR foodcourts are open 24hrs. The AKL foodcourt was open from 6am till Mid when we were there back in May and Sept of 2001. The Swan/Dolphin foodcourt Tubbie's is open 24hrs.
I have not stayed at the All Stars in many years but I think it was something like 6am till 11pm or so. Maybe someone who has stayed at the ASMo recently can confirm?
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