So I'm going on my first group ride tomorrow. Weather promises to be spectacular, so I suspect there will be a pretty good turn out. Got a couple questions on proper etiquette:

How do riders of all abilities stick together? Do the fast folks slow down and the slow folks push themselves hard so all ride together? Does everyone just go at their own pace, and the string of bikes spreads waaaaay out? Do they divide into subgroups of ability and those subgroups stick together? I'm guessing the answer is "all of the above" depending on how a particular ride is organized, but what's the most common approach you've seen?

What happens when someone gets a flat? Does the whole group wait for the fix? Or does the rest of the group say "See ya!" and leave the poor flatee on his own? Does this depend on the attractiveness of the flatee?

How does drafting work? Am I OK just sticking in other riders wake, or will I be expected to break wind once in a while ... wait, that didn't come out right ...

If I'm in a particular group that's either too slow or too fast for my natural cadence (most likely the latter!) should I break off from the group? Suffer through slowing or speeding to match the group? Or insist that the whole group match my cadence?

What other questions should I be asking but am too inexperienced to even think of?

Thanks all!