DH and I are 53 and newly empty nesters (DCs are 21 & 19). We have a small number of friends each, some of whom we'd count as "couple" friends, i.e. we all go out for dinner together, or to the theatre, or get invited for Xmas drinks. They are mainly my residual school-gate mum friends who have other halves my DH gets on with, plus some couples from our early working lives pre-kids. But numbers have reduced over the years as families have moved elsewhere or split up or else just because their kids went to different secondary schools and we lost touch. We sometimes muse about whether/how we might make more now that we have a bit more free time on our hands.
I'm curious. If you have made completely new couple friends in your 50s, where/how did you meet?