Around here its customary to charge whoever smokes with you 3 bucks. I'm pretty loose with that anyway. Like usually if were smoking at someone elses house I won't charge them or I don't charge first timers and shit but people who smoke with me consistantly and have never supplied always get charged. Plus it pays off the bag for me so in the end I've come out even. But usually that never happens but one of my "friends" recently has been mysteriously ending up with my bud and then he leaves after every night we smoke and it's starting to piss me off and he told someone that one time he smoked some of it while he was at his house and I didn't know he had it.