If you want eye candy, 500px.com will be much more satisfying than flickr.
shuttersisters http://www.flickr.com/groups/shuttersisters/ has decent photos that are well liked by the younger female crowd.
I use groups to promote my photos, not to stalk photos. All groups have inconsistent qualities. I think you should use contacts for eye-candy or learning purposes. You get much more consistent work if you follow the
photographer, rather than the group.
A few contacts I recommend:
http://www.flickr.com/photos/rebba/with/4860920975/ (HIGHLY recommend)
http://www.flickr.com/photos/martaorlowska/
http://www.flickr.com/photos/zebandrews/
http://www.flickr.com/photos/maxxwellsmart/