Day Pass Gyms or Hotels with Fitness Facilities?

Hi all, I'll be visiting Okinawa for 11 days in early July and I'd like to squeeze in some strength training while I'm there.

Is anyone aware of any local gyms, hotels/resorts that offer day passes so I can lift some weights?

I have no friends or family in Okinawa, so will literally just be a random visitor wanting to lifts some weights once or twice during my trip!

Thanks!