Mindfulness can cure social awkwardness if applied consistently. If you find yourself in an awkward social situation, the mindful thing to do is not to pretend you are not awkward. If you are feeling awkward, the only mindful thing you can do is notice that you are feeling awkward. Once you notice that you are feeling awkward, you can start to unravel the awkwardness. If you are feeling awkward because you think you may have a bowl of spaghetti on your head, then you are probably worried about how you are being perceived.
When you notice that you are worried about how you are being perceived with the spaghetti on your head, then you are being mindful of your feeling (the awkwardness), your insecurity (the bowl of spaghetti), and your projection (the worry about what the other person thinks of you). As you consistently apply mindfulness, you may notice a hint of ridiculousness in your insecurities. When you develop awareness of the fallacy in your insecurities, you can transform them into confidence and watch the awkwardness subside.
When you practice being mindful through your awkward interactions, you will notice a strong sense of reward and triumph as you successfully negotiate each difficult social situation. When you are mindful of the bowl of spaghetti on your head, you will begin notice that other people are wearing meatballs.