Here's a mastermind groups analogy of like-minded people.

Think of it this way, a group of buddy's are out on a day fishing trip...now there maybe three, four or more fishermen on the boat. They all have different fishing styles or methods and abilities from each other but, each fisherman will most definitely come from a different background.

Here's the thing each and everyone one of these fishermen are trying to achieve the same goal, they're looking out for each other on board the boat, helping where they can. Can you just hear them yelling out at each other when one of the fishermen is trying to reel "the big one" it's all hands on deck! There helping each other out, one of them has his thoughts on how to real in the big fish, another one is reaching for the fishing net, one more has his finger on the shutter button of the camera,etc.  When it's their time at the rail of the boat, they move on to the next fisherman who gets a nibble on their line.

They all have the same similar and/or common goal each time they get together on the boat. They all want to catch the biggest fish they can and as many as they can! This is their common goal for the day.

Just like you would in a mastermind group meeting!