Older women are almost always easier to pick up, they know what they want so if you get the good signals from her chances are big that you can go all the way with her.
With older women you have to work a lot less then with younger women… Older women know that their “market price” is lower than young girls and therefor they will take advantage of the chances much more than young women.
What I do when I pick up older women is just standing next to them to start talking,
give her a complement about something she is wearing… I usually get good responses by doing that.