Just as in locations, lookat what you will really use before making a decision. Examine a few clubs. If a facility is said to be available 24 hours, is it really or just on certain days. Make sure the staff is cerififed from a legitimate organization such as the American Council on Exercise. Is the staff courteous.
Service is the key to membership retention.
Having the best equipment won't do you any good if no one is there to help orientate you on its proper use. Local facilities can give you a face to deal with when you have questions or concerns. Ask for free passes before you join and try out the club for a week on the days and time you will be exercising so you can get an idea of the traffic inside. Make sure there are adequate showers and changing facilities. T he staff should take pride in the club and this should be reflected in the maintenance, cleanliness and overall appearance.