Hey take it from a guy who use to have coke issues.. Twice a month will start to go down hill for you...
This has nothing to do with you starting to do more than a gram twice a month it has to do with your body slowing getting weaker from coke use.. After a year of twice a month you will start to react diffent to the coke then before.. It will take you 2 days to recover from 1 night out..
And muscle growth will completely stop.. Anywork you did prior or a few days after will be ineffecitive...then you start to feel just plan tired between working out and work and drugs your body will suffer..
It also has to do with how much you take in, if your just talking a line or 2 you'll be fine, but I dont no anyone who has been able to do 1 line and not want to finish the damn bag off...
But dont get me wrong coke ios some good shit..lol,, i sure loved it for a long ass time... thank god I past those days...
Almost forgot as a side note, me and my friends used to do coke on a Friday night to have my abs ripped for Saturday at the beach..It works because it dehydrates you and when your on coke you dont eat...