I used to run with a club when I was younger. We never ran with watches. The older guys thought us the 2/5/8/10 miles laps around the park and on the roads. Then when we became the 'older guys' we thought the younger ones.
There was three different paces we ran at: easy, steady and hard. No one knew what pace per mile these were. We just went out and ran and had fun. This was when we were 15/16/17. 4 of us ran under 9:20 for 2 miles so we decent runners too.
These days I never leave my house without my Garmin. Just reading back over that it makes me sound real old, I'm only 25!