Some advice on winning at B & M's

[limodude]

I play online quite a bit.(5-10k hands per month) I understand that being a winning player at LLHE means you are winning somewhere between 2-5 BB/100. I go play in my local B & M's once or twice per week and I do ok playing the 3/6 or 4/8. But obviously you could never win any decent amount of money at that same BB/100 rate at a card room. So if 5BB/100 is all we can expect to win then how is it that one could win decent money at a B & M?