24 Hour Fitness has been in business since 1983 (originally under the name 24 Hour Nautilus) and since then, they have become a popular choice for fitness and workout enthusiasts in the United States. In fact they are the world's largest privately owned fitness club by number of members. As of 2015, 24 Hour Fitness has almost 4 million paying members and has more...

1-800 CONTACTS is the largest retailer of contact lenses in the world and has been shipping low-cost lenses to people’s doors for more than 15 years. 1-800 CONTACTS offers the exact same lenses as prescribed by your eye doctor, but at a discount. With the largest inventory of lenses of any contact lens retailer—almost 10 million—they’re very likely to have your contact lens brand...

23andMe was launched in 2006 and offers to consumers DNA genetic testing to help determine a persons ancestry, genetic health risks, carrier status, traits, and overall wellness (based on the persons genes). In all there are more than 90 reports that customers can get access to (depends on service ordered). 23andMe.com currently have over 5 million genotyped customers. The name of the company refers...