We never had a problem with getting as many drinks as we wanted to take back to our room, you'll prb. find that as well. Just ask for stuff, your not likely to get a bottle of hard liquor, but sparkling or house wine maybe, I think they are optional maybe for rewards perks or something... But I have seen them many times.
Again, if you want just ask for a cup of whatever on the rocks or not, and a cup of mix, we've done that before too.
They are there to make your vacation wonderfull, just work with them.
My wifey and I are going to CTI in Nov and I'm wondering the same thing. Our room won't have a minibar, and I'm wondering how I can get alcohol in my room. Say I want to drink some wine before dinner or something, can I just ask for a bottle? Is there a charge for that?
Does this policy differ between the Couples Resorts or between room levels? Several times at CSA we asked for (and promptly received) a bottle of champagne or wine to take to our room. (We never asked that it be delivered.)