Bikes typically have right to be on the road. Courtesy, all too lacking on both sides (auto and bike) would seem to indicate a bike should pull as far to the right as is safe for the bike. They must obey all stop signs and light.

Personally, I don't like riding in big groups (although I do a occasionaly) because:

1. they tend to pack up and **** off the auto drivers by being 2-3-4 deep from the side of the road. They'll argue it's safer- BS. It's discourteous.

2. Packs, when close together, require a lot of attention, a little judgement, some communication, and a modicum of skill. If you go out on large group rides you are trusting that people you may or may not know well have these items well in hand. They may not, and when one falls, a bunch others may go as well. Plus you have to concentrate, so it's not as relaxing.

It is a great, healthy hobby.

Two other key rules-

1. don't assume the car sees/saw you, and,

2. don't expect the driver to do the right thing, always be a little ready for a bonehead move.

Other than that- enjoy!