SDO + double neck

Recently I am playing a game named SDO (Super Dance Online). This is a game that looks like O2jam, the difference is this game only use 4 keys instead of 7 keys in O2jam and SDO have many nice pop song that can always be listen from the radio. I like this because you don't need to purchase the song I like, I can join any room without consider the song. This game have chinese, Malay, English, Japan and also korean song.

Interested in this game? Just click on the link below to proceed.
SDO

After register just let me know!!!!
Here are some nice photo








Did you see this guitar before?



This type of guitar is called double neck guitar.
I thought this type of guitar only use at concert to amaze viewer, but now I just get to know it can be use as a couple guitar as below:



Here is the music video:



So it is nice to have 2 guitarist as a couple.

Do you know any other usage for the double neck guitar?