Birds of a feather.

[Humble]

Hi,
AFAIK it’s usually a derogatory remark.
- How can Bill and Tony be friends?-
Oh, they’re birds of a feather.
Can it be used in a positive light?
My friend and I both like football and have much in common. We’re birds of a feather.
Thanks.

[mykwyner]

The full saying is, "Birds of a feather flock together." It means that people of similar interests, behaviors, backgrounds, etc. will hang out with each other. While it is not necessarily derrogatory, it usually means that you are condemning one person based on the reputations of the people he associates with.

[Humble]

Tnx, Mykwyner.
So, nobody would say We’re birds of a feather, would they?
Tnx

[englishstudent]

Hi Humble,

In many professional circles, they arrange BOAF
(Birds of a feather) sessions to discuss topics related to a subgroup in that meeting. For example, every year in Las Vegas
there is a conference of companies that make networking equipment/software. That meeting is called "Interop", by the way. So, at the Interop, there may be BOAF sessions
(seminars/talks/presentations) related to topics such as routing
in the Internet, or emerging security issues etc. A particular
BOAF session would be attended by people who are interested
in that particular topic. Thus the attendees are BOAF.

If you do a search for "boaf session" on Google,
you will see such sessions related to other industries.

Hope this helps.

[Humble]

Tnx, englishstudent.
Um...it means the answer is affirmative, I guess.