How many players do I need in the pot to be calling from big blind?

[AlmightyJay]

Don't be results oriented. Just because you folded hands that would have flopped big hands doesn't mean you should play them all the time. If you fold 72o UTG and the flop comes 777, are you going to start playing 72o all the time?

You can play a bit looser in the BB in the face of a raise than in other positions, but you should still be tight. Be more liberal with suited cards especially. Implied odds are big for those. But don't start playing rags.