I did once, briefly. She had two girls, 5 & 7. Both with different fathers; one dead, the other left for cigarettes.
The first "date" consisted of trying to watch a movie with their mom while also doing basic shit, like watching the kids put on a show, cooking them dinner, etc.
Honestly, I was absolutely not impressed with the mom. She yelled at the girls for small, really innocuous things, and had absolutely no idea how to make the girls follow directions.... besides being just dumb & boring company.
At the end of the night, it had gotten extremely late, and I was putting on my boots to leave. The two had already been put to bed but refused to sleep. Then they came out in their pajamas w/ blankets & animals, planted themselves at my knees, and asked me if I was going to stay. Their mom just said, "well, now you don't have a choice".
Holy fuck.... the crazy bitch she right; that was a hard spot, and I gave in. That lasted about three months, before I'd had enough of their unstable mother and had to leave. Shit was one of the hardest things I had to do, because of those kids. They were sweet, well behaved & smart, as long as they had a normal parent present. I absolutely knew I was being a replacement dad at the start, so I just tried to be a good one, for their sake, for as long as I could.