Let me give you a tip for free coffees the easy way:

I’m a smoker, and after each drag I spit straight into a plastic cup that I carry around with me. I usually fill my cup up in about fourteen days (I like a medium too!) which means that if I start on a Monday with my pre-work cigarette, I’ll have a medium drink ready to go by lunchtime a week on Friday! The tobacco colours my spit brown, and the residual nicotine in the saliva actually gives me a kick (I can feel it in my heart and brain). It’s free, and it’s healthy because you’re spitting out all the really unhealthy stuff in cigarettes! I hope this helps, good luck!