Actually, not all of these are legal everywhere. In the UK, price discrimination by gender (e.g. by nightclubs) is illegal: see http://www.equalityhumanrights.

Actually, not all of these are legal everywhere. In the UK, price discrimination by gender (e.g. by nightclubs) is illegal: see http://www.equalityhumanrights.com/advice-and-guidance/your-rights/gender/sex-discrimination-as-a-consumer/sex-discrimination-as-a-consumer-your-rights/ http://www.equalityhumanrights.com/advice-and-guidance/your-...