Not long ago I had the same question as the OP. While looking for some sort of answer I stumbled onto a similar thread. Here's a link to that topic:
amoged-by-a-brother-vt176640.html. A poster named hugge responded to a similar question as the OP here.
Quote:
Maybe this can inspire you. Especially his story in the beginning about some alpha male stealing the show.
http://www.youtube.com/watch?v=b-a1jXgAsQI
First reaction - "feeling sorry for myself".
Second reaction - "try to challenge the alpha male".
Third...? Check out the video.
When it comes to women, there is no such thing as a "bro". Every man in the room means competition, and you are all on your own. There are guys that may spoil your game because they are unaware of what they are doing and how the game works. There are also guys who may spoil your game just because they want the girls themselves. In any case, I think the video above explains the most appropriate action to take quite well.
Hope that helps you out a bit
edit: Almost forgot to mention that at the end of the video he finishes telling the story he opened with