How do i approach a girl in the club?

i am 20 year old guy, who is living with the weight of virginity on my shoulder, can you tell me how can i lose it, i was thinking about going to a club to pick up a chick, how do i approach a girl in the bar, i am really shy, would i be kicked out by a bouncer if i asked a girl for a dance, can you please tell me how do i specifically look for girls who are interested in guys in the bar?