Probably the reason they want you to keep drinking is to prevent you from going through withdrawls and possibly experiencing DTs and a seizure which can be fatal. When i was first looking into rehab and the first place i checked out didn't have any openings i was actually told to keep drinking moderately until a bed came free. Instead, i checked myself into an ER, ate the medical bill over time and got the safe medical detox my body needed. It was worth it.