I agree with Dom.
Bingo and slots are games that should be targeted at older women. Women don’t want to stand around and figure things out on table games. They also like the thrill of winning something that has loads of players involved, can’t really do that with blackjack.
Personally, if I were in the site owning business, I would open a bingo site, and theme it entirely around an older female audience. I guarantee it would be a success.