The two things to remember with alcohol on Atkins are these:

1) While your body is dealing with the alcohol, it will cease burning fat. It will always use alcohol as fuel before fat. However, once it's done with the alcohol, it will immediately go back to a ketotic state and continue burning fat. So technically you don't drop out of ketosis, it's just delayed.

2) Be very careful with your alcohol consumption while in ketosis. You will become inebriated more quickly and you won't have the tolerance you normally have. The effects can be quite dramatic in some people.

So bearing these two things in mind, and being an adult, the choice is yours.

If you want to have a drink, I would go with dry white wines, white spirits(vodka, gin,etc) and diet sodas. They have the fewest carbs.