According to the Most Holy Book, there are no restrictions to what you can wear, as long as you don't make a fool of yourself.
The men generally wear what rich men wear.
Indian men wear a Sherwani
The men in India wear Kurta's
what did the Lenape men wear
Many men do wear pajamas.
The Bahai Faith does not use any code in its scriptures, which everyone is encouraged to read for themselves. See the Bahai Reference Library for a good selection of Bahai scriptures, all for free. The Bahai community today also does not use codes, secret handshakes, etc..
Men wear belts around the waist.
Men can wear leggings with T-shirts.
Pentecostal men do wear hats.