First Law: 'you can lead a horse to water, but you can't make it drink' - this cliche means nothing in Hubbly Science. Everyone - man, woman, child - who spends a significant amount of time around the hubbly will, eventually, partake of its sweet, sweet nectar.
Second Law: One's insanity. Two's company. Three's a crowd. No one person can smoke a regular hubbly alone. He will eventually falter, waste the rest and feel guilty. Two people are better, but this is a push. Three or more is best.
Third Law: At least one person in the group of hubbly-smokers will, at some point during a session, say something stupid.
Fourth Law: Eventually, no matter how hard you try to prevent it, a coal will fall onto the carpet or safety rug.
Fifth Law: He who makes the hubbly has first smoke or, at least, has the first pick. In the same breath, he who shotguns last makes the hubbly.
Of course, the avid hubbly-smoking group will develop their own quirks and nuances relating to the hubbly; but their actions will remain within the basic structure of these laws whether they like it or not.