I never take a gun from someone until they demonstrate that it is in fact unloaded. Also, alcohol and guns never mix. Why would you dry fire a gun? What does that prove. You can’t judge the recoil? Plus if it a rim fire, you’ll damage the barrel.
I would. If the person handing it to me believes that it is unloaded but has not been trained to prove it prior to the transfer, then I would be concerned that he might be so untrained as to pull the trigger as a means of demonstrating that his possibly false assumption is true.
I would accept the gun and check it myself and then train the person in proper procedure.
Also, dry-firing is widely accepted as good training for developing flinch-free trigger control. I don't do much myself and certainly recognize the risks of pulling the trigger when one believes that the gun will not fire. It's absolutely essential that the other safety rules be followed.