My piece of advice is to learn to cook yourself, and offer regularly to make these girls their supper. Not only will you avoid making the serious mistake of assuming that the girls should cook because they're girls, but they will tell their friends of your selflessness and ability - and you will be the recipient of some very welcome attention.
Actually, that does look a bit sexist now that I read it back. I was merely hoping to strike some kind of deal in which I'd do their share of other housework in return for delicious meals. Although perhaps it would be worthwhile to learn to cook myself.