Greetings As throughout the US, greetings that would be construed as personal inquiries in most cultures ('How are you?') are generally meant as pleasantries rather than serious inquiries.
Interacting with strangers Similarly, the informality of American culture makes interactions between strangers relatively common. Don't be surprised if strangers initiate conversations unexpectedly.
Taboo topics Religion, politics, and sex are often best left for discussion with only the closest of friends in the United States.