Recently I got an email about a job that seemed interesting. It's a well known company that used to be a startup but is now a mature company. I went to the job description page: 8+ years experience, tech stack I'm familiar with, mostly backend work, seems ok so far. Then I get to the last line. Open office, has video games, happy hours, other typical things designed to attract those in their 20s. It's all a hidden me…
We all had nerf guns, regular silliness, and fairly regular beer+gaming sessions with the app company down the hall. They had a couple of full size multi game arcade machines, and a console. :)
I'll be old when they nail the lid shut :p I'd rather talk about games, motorbikes and beer than golf any day thanks. Unless you mean willingness to give up weekends for dubious reasons and pull stupid hours regularly - then on that score I've been old since my 20s.
That said I have experienced age discrimination - tech is rife with it, but never if I got past HR or recruiting types. I don't know why tech makes it more likely - it's not like every or even most companies are looking for the naive to work 10am-10pm daily.