I've thought about getting aerobars, but I'd only use them when I ride out to the cornfields/middle of nowhere. It gets pretty windy when there's nothing to break up the wind. Aerobars in an area with traffic/people/whatever does not seem like a good idea, as it limits your field of vision and makes steering pretty difficult.

What kind of riding does your girlfriend do?

I think a good option for her would be a set of ergo drops with hoods.