3 times altogether. I'm doing this backwards.
On two occasions (1 last year, another was about 3 years ago), I didn't fancy their faces - so, walked in, took a good look at the faces, then walked out. Really nice figures but one looked quite plain and the other had a tranny vibe facially.
And the 3rd occasion was the 1st walkout which was about 7 years ago - she kept me waiting for over 15 minutes, then sent a text saying she was ready, so, I walked to her door which took another couple of minutes as I was parked on a different street. Her door was ajar, so I walked straight in and she had a go at me for not knocking. I asked her if she was fucking serious, then walked out.