I used to be a “Railtender”: selling wagon-lits coffee* and snacks in the Dutch trains, and I made really good tips each day, about 50 to 100 euro in tips**….in a country were tipping was not the norm, this next to my normal pay check, with shifts and even a small commission on sales made above a certain threshold.
I Know I made more money then the two management levels above me.
*really really bad coffee!, wagon-lits coffee for those not familiar with it…tastes like it was made out of beans found in bio-hazard container form the local VD clinic
** the railtenders who made the good tips all had a secret weapon, some had realy spectaculair breasts, some could work as male gigalo( and some did and actually picked up some their clients while selling coffee)…me: I projected a Bambi vibe, that made old people want to pat my head and give me something extra for my studies….