You need to ignore immediate circumstances and focus on the potential. If you need to hold the lift to get her number, or talk to her on the subway with 10 people staring at you, learn to do it anyway.
The key is, once you are meeting this girl later and getting intimate with her, who will care about the people you inconvenienced a week ago? Are you ever going to think about those people again as you get together with this beautiful woman and enjoy her company over and over for months on end?
Who cares about them? Just get the girl! Be willing to endure a little heat, because it's worth it to get the digits of a beautiful woman.