OKW - no. Riverside - don't think so, but I'm not sure.
Normally deluxe resorts have room service, values and stand-alone DVC properties (i.e., not attached to a resort - so SSR and OKW) do not, not sure where the moderates fall.
You can get room service at any resort that has it, whether you are staying on cash or points. So if AKL has room service (assume it does), you can get it.
Not sure about other moderates but CSR has room service and it is quite a reasonable choice on their menu - could be because it hosts so many conferences.