RCCL has six very cheap cruises this summer on Voyager OTS to the Baltics and Norway out of Copenhagen.
They include their drinks package, which presently sells for 500 dkk per day ($70) on some sailings.
The price for me solo in a GTY inside cabin, Norway, 28th Aug, was 6.500 dkk - less than $1000 for seven nights with DBP and grats. For two in the same cabin it was 11.012 dkk.
If you calculate a bit and subtract a calculated price of the DBP, the cabin alone is 1900 dkk without grats - that's less than $275 for a week. Only, you have to have the DBP included.