hollywood Deryck Whibley sum 41 musician drinking avril boa sunglasses Why should Avril have all the fun?

We spotted the soon-to-be ex Mr. Lavigne (if all the rumors are true, anyhow) leaving BOA with a pal last night. But it looks like he took a little doggy bag - or doggy cup - with him!

We have no idea what's in the red party cup...but at least he's not driving!