On Oasis, the concierge lounge is open 11am - 11pm. Beer, wine and soda is available without additional charge throughout these hours. Liquor and mixed drinks are available during the 5-8pm happy hour. If you primarily drink beer, the package might be superfluous.
Since we are primarily wine drinkers, when we sailed Oasis in a grand suite, we stuck with what was available in the suite lounge and paid out of pocket when we were out and about/in the solarium/on the lido deck, etc. It worked out to be way less than what we would have had to spend on beverage pacakges.
As always, YMMV.