Sounds like you want that sort of Sex And The City, Entourage, Friends, Seinfeld type posse to roll with.
First of all, it helps to live in NYC or some similar densely packed community with lots of stuff to do where everyone lives in close proximity.
The basic structure is you and your BFF. Then you should have at most 2-3 additional core friends. They can either be another BFF pairing, or secondary friends of one or both of you.
For example,
Seinfeld:
Jerry =BFF= George, Elaine and Kramer as secondary floaters of Jerry
Entourage:
Vinny =BFF= Eric, Drama =BFF= Turtle (2 pairs)
SATC
Carrie =BFF=Miranda, with Charlotte and Sam as floaters linked to Carrie.
Friends is a little larger and unweildy
The core group is
Rachel =BFF= Monica, Chandler =BFF= Joey with Phoebe and Ross as floaters linked to Monica (former roomate and brother)
Note that in the dynamic, the “floaters” often may not even get along that well with each other nor may both BFF pairs gell with the other BFF pairs. Phoebe and Ross are total opposites. Eric doesn’t bring Turtle or Drama to business meetings, etc.
A RL example, I had a group of friends I used to hang with when I was home from college. 2 were friends from high school (P and S) and the third © was a coworker of S. We’re all good friends, but the natural configuration was Me=P, S=C with the pair linked through Me and S. P also had the added benefit of being a bit of a dumbass. As all of us are a bunch of sarcastic wiseasses, we often used to say that Ps purpose was to periodically do something dumb (like shave fraternity letters into his head) so we had someone to focus on instead of turning our sarcasm on each other.
Now why a total of 4-5 people you might ask? Simple. 4 people is the maximum number of passengers a cab will typically take. 5 is the number of passengers that will fit in a typical sedan (with one riding “bitch”). More than that, your start getting into issues of how to split the group for cabs or rides and such.
Ok, so now you know how to organize your codependent sit-com posse. Where do you find one?
-Having lots of free time helps.
-Not having a lot of money also helps
Both these factors work in a number of ways. First of all, you get forced into situations like living off each others couches. You also spend a lot of time hanging out, shooting the shit, doing bong hits, drinking, watching TV and other crap where you get to know each other.
-Alternately, having money while most of your friends don’t also works as friends come over to borrow shit
-Having a group of coworkers with the same interests who are about the same professional level. I used to work with a group of guys (all mid to senior level managers)and we would constantly be hanging out, bothering each other, making fun of the dumbasses on each others team (hey, I heard Johnson flew halfway across the country for the wrong project and didn’t tell you where he was going), drinking after work, bitching about the bosses, etc.
-Having a number of regular hang out spots. Ideally you want to be able to send a text message “pub” or “drinks” or “the spot” and everyone knows what you mean.
-Some single shared interest - acting, bitching about your love life, work, school, kickball, whatever. But to truly be effective, it should pretty much be your only shared interest so you have unrelated stuff to talk about.
That’s all I got so far. I’m pretty much making this up as I go.