Indeed the hotel CC has confirmed me this option

3.000 points / night for grand club access, on each type of room, at standard rate (no member’s discount or advance rate, but it means “only” $100 more on 3 nights)

that’s much better than $300/night for Lounge accesa 😃

thanks a lot sch_flyer for this suggestion 👍

now I need only to earn 9.000 points .. 🤔 , or buy at $216, if no promotions on next months.

or I could really start join Hyatt. There is one nice property on small luxury hotels at convenient rates near Milan where I could stay 10 nights on next months.