Nintendo’s relationship with the older demographic continues to be worthwhile for the gaming company, since Nintendo Wii will be a highly visible part of the 2011 Life@50+ National Event & Expo. Hosted by AARP and in Los Angeles this year, the event opens on Sept. 21.

It’s a return engagement for Nintendo. Seniors have responded well to the social and physically active Wii gameplay style, as Nintendo reports, with the console and motion controllers finding a home in physical therapy sessions and assisted living facilities as well as in private households.

Nintendo will have hands-on demos of Wii Play: Motion, Wii Sports and Wii Fit Plus, in addition to a “block party” with live music, food and wine.

The Wii console broke barriers when it consciously addressed consumers who had never before played a video game and introduced gaming controlled with physical motion. It was a smart move, since about a third of the U.S. population is 50 or older and collectively has more than $3 trillion in disposable income, according to AARP. Combine that with the realization that people nearing 40 have never lived in a world without video game consoles, along with other factoids like the average age of a gamer is 37, and it makes a lot of sense for Nintendo to continue courting AARP’s constituency.

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Life@50+ National Event & Expo –

Photo courtesy of flickr user Tom Newby, used under Creative Commons license

Infographics courtesy of the Entertainment Software Association (ESA):