Hmmmm..never tried a drink limit. Don't think I could count that high anyway. We just put it on a credit card and pay it off before the next cruise. Don't look at the bill until the end and it wont hurt so badly.
Seriously, you might check into buying drink coupons. Don't know if they offer them on all cruise lines, but they do on some. I've never checked into it because, in all honesty, I don't look at the bill until it's mailed to me. I truly mean, I want to enjoy my vacation. If I have to get a 3rd job, I will, but by God, I'm going to enjoy my vacation!! Best wishes and have a wonderful cruise!