Well, in order for it to be considered drifting you need to be traveling in a line, while the vehicle is pointed at an angle to that line (preferably 20 degrees or more).
Hint: GAS PEDAL. Lots and lots of gas pedal.
What you don't want is for the rear tires to grab very well.
Use the front end/steering to 'whip out' the back end, then stay on the gas. It's a fine line between No Grip and Grips Too Much. You have to find that line and walk it.
I learned how to drift on the snowy roads of Colorado more than 20 years ago. We didn't call it drifting though; we just called it "fun as hell". The road to our house was a perfect place for me to practice: Over the RR tracks, then a 90 deg. left (whip the back end out)...travel almost perpendicular to the road for about 100 yds. then let the car come back to center while stepping on the gas at a certain point, and the tail end would whip around to the other side...getting ready for the 90 deg. right turn. The back end stays out to the side as I travel up the slight incline to the intersection. When I got there, I was usually facing the direction of the intersecting road.
I've actually drifted a 20-pass. van up the road to the hotel where I worked. I didn't get fired, but I did get plenty of tip money from the guests. Many of them wanted to do it again.
So we did.
The other thing you want is SPACE. Lots and lots of space. That parking lot you guys were in was a prime practice spot. A closed track is even better.
It's good to practice on wet or snowy (not icy) pavement. Take that practice to the dry roads and you'll be a pro in no time!
