I have probably been playing for only 6 months.My beginners class is learning standard american.The problem is that everyone in the club and elsewhere that i have met dont play this.They either play precision or incorporate 2/1.My question is, i am putting in alot of time playing and reading about s.a,and if im going to eventually play something else should i just go ahead and learn other bidding systems so that i dont have to worry about trying to unlearn some things that i have already learned.Please help,Thanks.