How to subtly ask a guy out?

Okay come with a group of friends and their boyfriends and ask if he want to go to a movie or out to eat with you guys, then make sure you sit next to him and let him get to no you and you get to know him alittle more, then say "we should do this more often" , but make sure he is having a good time. Then just repeat until he ask you out, but if he doesn't ask him out whne yoo see hime after you third group date.Finally, MAKE SURE HE DOES'NT HAVE A GIRLFRIEND. And you will be just fine