I stood outside for about 15 minutes and saw six of them.
Stellarium is a good app to download for free and show you where Gemini and the other constellations are located.
I was outside — in Southern Idaho — for five minutes and saw two of them. Wind chill is 23 degrees here. After the five minutes the thrill was gone!
The missus and I decided to sit on the back porch and watch the sky, not knowing this was tonight. Saw 15 in an hour, even being in a not so good area to watch. At least 2 spectacular ones burned across the sky for us. It was one of the best shows we ever saw. Really wonderful...