Drive Thru on a bike?

So I'm wondering...since a bike is legally a vehicle on Georgia Roads..can you ride a bike through the drive through at a fast food establishment? I know you can't walk through - they will say they can't serve you because you are not in a "vehicle" but does a bike count as a vehicle in this case? Anyone have any experience here? The lunch traffic by my office is nothing short of horrendous, and I keep telling myself I could pick up my lunch a lot faster if I just hopped on my bike instead of firing up the gas guzzler.