The room service fee is $5.00 . We just had this same situation on our B2B. First leg we had re-fared and had to purchase the Plus 60. On the second leg, 15 day TA we had the Plus 50.
Plus 50 had everything except the 2 casual dining options, terrible deserts, juice bar and most importantly the Oceans Now activation.
To upgrade it would've been $300.00 for the 2 of us. We decided to activate my wifes Ocean Nows at a cost of $14.95. This enabled us to order drinks or food to our room or wherever we were at no additional cost.