I'm 42 and I still play. In fact I didn't play video games much at all until I was 27, tho I did play the old Atari cartridge stuff as a kid when my dad bought one. Time spent gaming goes up and down and I play less than I used to...but I still love them.
A lot of the female (and male) gamers I've talked to online over the years have been within 5-10 years of my age, so I've always thought it was a fairly normal, if perhaps smaller, age group, among the many age groups.