How do you find friendly people?
First, you just need to find one - yourself!
Your actions & attitude towards other people will usually determine whether they are friendly or not. There's always someone having a bad day that you just can't help, but most people resond to friendliness.
Smile. Say hello. And be geniunely interested in others!
"Take a chance that the other fellow will be friendly. It is always a gamble, but you'll win 99 times for every time you lose, if you just bet on his being friendly. Refuse to take the chance, and you'll lose every time."
- Les Giblin, "How To Have Confidence And Power In Dealing With People"