First off, let me state that I work in IT, so meeting women at work is hard enough as-is. I'm also not horribly shy, but approaching is a weakness.

So yesterday while onsite at a clients office, I see this beautiful girl who works there. She's talking to the ladies up front about something or other, but I catch the odd glance from her. Now I'm interested, and thinking she might be even slightly interested, but since we're both in a professional situation, I do nothing, thinking that I should stick to the job at hand. What can I do in these types of situations without looking like a creepy IT guy?