Dream C Club is not an adult game. But, there are elements in Xbox 360 title that smack of an eroge (erotic game)
Custom Maid 3D, on the other hand, is an adult game as far as we know. Like Dream C Club, it is set in a night club and features maid outfits and singing. Unlike Dream C Club, it features other things.
Look how the dance sequence for Custom Maid 3D (above) stacks up to Dream C Club (below).
Custom Maid 3D, which is being developed by erotic game maker KISS, is slated for Windows XP and Vista this December.
Custom Maid 3D [Official Site via はちま起稿]