Thanks for starting this trip report!
Curious to know if Luminae on Infinity will allow you to order from the Blu menu at dinner? On Millennium recently, they would allow Luminae guests to order from the MDR menu, but not Blu, even though all three restaurants share the same kitchen space (although suite guests were still welcome to dine physically at Blu on space availability). But in the past, other M-Class ships have allowed it - so guess it depends on the specific crew/management onboard.