The "Two Step" is a dance you can do in night clubs as well as ballrooms, weddings, cruises, etc. It's an alternative to the "Slow" dance. That's the dance where you stand, put your hands on your partner's waist and your partner puts her arms around your neck and you sway back and forth, back-and-forth etc., etc.
"Two Step" is perfect for medium and slow music. The Two Step is danced to popular music, mostly ballads. Songs such as "Lady In Red", "On the Wings of Love", "Love the World Away. The song Lady In Red is a medium tempo song played at 39 MPM (measures per minute).
When learning "Two Step", or any dance, learn why you do steps a certain way. Figure out which one is correct and why. Don't just do a step a certain way because so-and-so says to do it that way. The movements should feel natural and not forced. It's not the patterns that makes a good dancer, it's how well you dance them.