This usually works for me
[QUOTE=Power Tool]I wish there was a way without being a dick to just say that I'm not interested in their company today.[/QUOTE]I always just try to say something like, "You know, I really came in today hoping to spend time with Destiny. I will be hanging out for a while, so maybe we can hook up before I leave." Or "I promise next time I come in, we can hang out."
Then it is up to you whether to follow through or not. After several diversions, most are perceptive enough and will leave you alone. I don't think I come off as being a dick. Just my 2 cents.