I had a small pension with a defense contractor I worked for in the seventies. The company had been sold and split up, but when I finally found the pension fund, it was being administered by MetLife--a good thing. The age of eligibility was sixty, and I took it, reduced bennies and all, figuring I might not live to 65. (That was before wrecking the rig last year BTW)
When I turned 62 last year that made me eligible for Social Security at a greatly reduced amount. I filed for SS retirement, again figuring that the way things are going there may not be such a thing as SS in three or four years. I have not yet received a payment this year, because they wait until a certain point when you have other income. Even if I earn enough to defer the entire SS amount this year, it sits there as an instant-unemployment insurance scheme for me. With my current job I have no unemployment or disability benefits because it's considered part-time. Of course, I've driven 16,000 miles for the job since last November, but that's not how they measure it.
IMO, anyone who is close to the minimum retirement age ought to consider taking the retirement a.s.a.p. You can keep working, whether it's SS or a private pension. I just don't think that we boomers can afford to depend on the government and our employers keeping their promises regarding retirement. So I say take the money and run.