Not nearly as great as the percentage of single guys. Depends, also, how you define 'looking'. Women don't have to look, as such; even the, shall we say, less attractive ones will have been hit on, by the end of the night. I only wish so many guys weren't so damned lecherous and assertive; really screws it up for those of us who aren't the most confident at approaching women (i.e. because, the more assertive guys are, the less girls have to be, in this respect, and hence, if you can't approach, you don't get).