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Thanks Hermia. You're absolutely right about the women. I would have got bored with girly talk and I would have got drunk and loud, being in my early twenties at the time.
As for Londoners, I understand that they take time to get to know people. It's just that I was used to Glasgow society, where everybody is pally and strangers are made welcome.
However, I did go sight-seeing and photo-taking, which I wouldn't have done if I had been sitting in a pub with a crowd of boozers, so maybe some good came out of it. Just felt a bit lonely though.