Your pitch is making an assumption that the hacker news audience is not in your demographic. It reminds me of back in the day when the example incompetent user was "your mother" or "your grandmother". I am a competent grandmother - I have a few thoughts:

1. My friend Jeff Johnson has a book on designing for the older users. "Designing User Interfaces for an Aging Population: Towards Universal Design" He lives in San Francisco if you want to contact him. https://www.amazon.com/gp/product/B06WPBK2V4/ref=dbs_a_def_r...

2. The Bay Area seems problematic for this age group because of rising housing prices. My non-technical friends are moving out of the area because they can cash out. My friends who are staying largely are technical or married to someone technical. I would target an area that seniors are moving into and need to meet new people rather than an area where seniors are leaving.

3. I am not sure how this is different than meetup. You would have to sell me to pay $15 a month when meetup is free until you want to host an event. Then it is $10 a month. And young people and men can come!

4. Most women are better at making and keeping friends than men. I actually do regularly hang out with friends that I have collected over the years.

5. I prefer mixed age groups.

6. I prefer mixed genders.