My mate Freddie, when we go for a meal I catch him tallying the cost of the meals as we order. He then jots into his phone.
Come bill time, he has his money sort, rounded to the nearest £. If we go in rounds, he orders everyone what he is drinking so he doesnt end up paying for luxury drinks, worst of it is he drinks Carlsberg or Carling rather than premium lagers like Stella or Peroni etc. Went for a week away to Devon at an Haven camp for the kids holidays. He would eat the left overs of all the kids food rather than leave it to waste, he would even finish drinks.
I fell out with Freddie in June because he found God and turned into a weirdo, wont go for a pint or eat with others unless they say grace etc. Fuck Freddie.