Self defense classes like this are perhaps of SOME use, but I think that they give people a false sense security.
Lots of

in that article...

...If it's a robbery and the person takes the precaution to wear a disguise like a ski mask, he probably intends to let you go...
...police departments advise against fighting back...
...A strike in the right place can affect vision and leave the attacker winded... (a crack head?)
...soft music plays while students go through the forms that look like dancing...
great, be sure to have your radio with you!
...the students are learning to use the attacker's force to make him lose balance...
for $59 a month?
...If somebody stronger is attacking you, you can stop them by weaving around and throwing them off balance...

yeah right
...As we know as a group a water bottle and chair anything can be used as a weapon...
Yep, leave the gun at home and just take your radio, chair, and water bottle.
Like any other activity, actions taken must be repeated thousands of time to become 'muscle memory' or when the adrenaline hits, it all goes out the window.
Multiple attackers, different scenarios from those presented in class, and little practice are not what the elderly need...they need a good ole' equalizer and training in how to use it.
I'd recommend spending $59 dollars a month on ammo.
OMOYMV