[header] How to act like one of the guys [title] Find out what they're into. [step] Learn about the things the guys in your group bond over. Do they have long conversations about the horsepower of their favorite cars? Do they spend hours reciting the statistics of their favorite football team? To join the conversation, you'll need to have a deep understanding of what they're talking about. 
[substeps] Guys may express their friendship by quoting their favorite movies. Watch the movies your group likes so you know what to say back.