Start a Dance Group

You like dancing, know others that do, and want to start a dance crew. Read this to start out.

Steps

Get a place to dance--such as a basement or your room--where you would have enough privacy and enough space for everyone to move around freely. You will want privacy because you don't want other dance groups spying on your group!
Draw up fliers so people will know that you are forming a group and looking for members.
Hold auditions and pick the best people for your style of dance.However, be a little cautious about people who are amazing. You can still let them in, but they could be spies for another dance group. Think about this: if they are amazing why would they join a group that's just starting out?
Once you've got all of your people, have a group consensus on a name.
Decide on when you will hold the practices (I recommend at least once a week).
Have everyone pitch in money for the costumes so your dance group will look awesome. Make sure everyone agrees on the costumes beforehand, though, and that the costumes make it easy to move around (do splits, handstands, whatever is appropriate to your type of dance).
Pick some awesome music that your dance group can dance to and do a good choreography.Make sure the music is family friendly if you plan to perform at all ages events.

Make sure everyone agrees to the music and moves
You should have 4 to 13 members, or it will be too much, unless they aren't going to be dancers (Like costume makers).
don't be the one who tells everyone what to do; make sure everyone is in charge!
don't let people in the dance group that are just going to goof around never getting anything done!
Check out different styles and music and see what suits you best.
If you're working towards a performance, try to stick to one style of dance. If you're a contemporary/modern dance company don't suddenly decide to choreograph a street dance unless some your dancers are really good at a second style.

Don't do a trick that you are uncertain if you can do it or not, if you can't do it you could end up hurting yourself badly!
Make sure the place you practice in doesn't have any sharp or dangerous objects!