I have been retired 2 years this week, and I think it took me about 6 months to get into a routine that I was comfortable with. Some might say that after working for decades with often little to no input as to the 'routine' that lack of a routine would be good, but I needed something of a schedule so I worked it out. As you often hear (newly) retired people say 'I have never been so busy', this is true with me. Hobbies can be a curse at times, especially if there are too many, but none have gone by the wayside, yet. I have been doing the things I long wanted to do but had been either simply put off or done at a reduced level for too long. I miss working on a team at times, but have no interest in going back.
I agree with FB on universal basic employment rather than a hand out, which to me guarantees that people will vegetate, and become slaves to the government. I realize that is a political statement, but that is where I am. Those who are unable to work is something else completely, but we are not discussing that. Also, as FB mentions, there will certainly opportunities that will open up as automation increases, and there really already are needs that are not being met. It took months for me to get an electrician in to do a fairly small job, as the good ones are all busy.
When I was a kid in the 60s I had a few technology books (written for kids) and among the few specific things I remember was that (in addition to flying cars and colonies on Mars by 2000) was that with the coming of robots and computers our biggest problem in life would be finding ways to keep ourselves busy. We have already been dealing with that in car factories for one. Looks like this will be ramping up in some areas soon (truck drivers and McDonalds), with others to follow. I think there will be lots of opportunities out there for things to do, if people are interested in looking, trying new things and want to work. If they don't want to work, that is their problem, not that of their fellow working citizens.