Everyone can join, just click on the /JOIN GROUP/ button and you're in.
(You don't need to write anything, you'll be automatically accepted).
Also, it would be great if you can put our icon on your main page.
WHAT TO SUBMIT
First please choose right folder! (Do not submit to Featured folder).
Second, in order to be accepted your photo must be retro/vintage. That means it has to look like it was taken years ago so it's not enough to take a picture of some old object, that won't give your photo old feeling.
(Also try to avoid dA cliches)
If you are interesting in post-processing your photos, check this tutorials for making that "retro feeling"
ofc, you don't need necessarily to use this.
You can submit three photos per week, and be selective about what you're submitting 'cos at the end of the month there will be voting for one best photo of that month.