Yep, many guys view it as an economical way to get some nookie until someone "better" comes along. Don't have to shell out all that $$$ to take a girl out on a date first. Of course, things DO get a little awkward when one tries to bring a date back to the apartment.
Not that I have any personal experience in this matter,
just an observation based on old college acquaintences who did.
Not if you're lucky.