v. The act of having sex in or around Denver, Colorado, USA, a city which is approximately 5280 feet (1 mile; 1.6km) above sea level, and is known as the "Mile-High City". Bonus points if the sex involved an actual dance club in Denver.
n. mile-high club
The group of people who have had sex as defined above.
I can't believe I lost my virginity through mile-high clubbing the other night!