INDEPENDENT.CO.UK - Jan 30 - That's £117 per person and nearly a whole day on bad dates. On each date, the average Brit will spend £29 per person. The research by eHarmony claims that the average bad date lasts just 60 minutes. This is two hours shorter than the average date overall, which is three hours long. The study also found that 52% of dates leave singletons feeling disappointed.