Doctor, I would recommend not going to the bars since those men aren't of your maturity and caliber. I would recommend that you identify your interests, besides work, and go to those places that have your interests. For example, if you like art, go to an art museum. If you like to cook, take a cooking class. You will definitely meet people at those places. If that's not fast enough for you, try internet dating, although it is more of a gamble.
As I medschool applicant, I imagine (or hope) Ill be in this boat soon. Keep in mind that guys are everywhere, where ever a pretty girl is at - we have a guy on the scene. Its probably your busy schedule that is obtrusive, because you have less time for hobbies or social events than other people. Don't be afraid to go after someone you randomly meet (like that cute guy you bump into at the bookstore, etc). Good luck.
Medical school really is a gift and a curse. I've been on the other side of this coin having been scorned by a med school girl myself. We're still friends, but then again she hardly has time for friendship either.