The "if possible" is a biggie, though.
Consider as an example - you have a group of 5 people. Each as 3 to 5 hobbies and/or social groups they like to engage in or be with, and they only overlap on one of them - your gaming group. That means that for each person, your game is in competition with two to four other things - and that overall your game is in competition ten to twenty other activities!
When those activities are all in competition for the same weekend time, it gets ugly, really fast. And that's only the regular things - not counting the collection of one-off conflicts (weddings, health problems, personal issues, and so on) that each of the five people are subject to.
It is a wonder that anyone gets any gaming done at all. having a regular game really requires a commitment, making the session one of the higher priorities in your schedule. And many people you may want to game with aren't willing or able to make that comittment.