Not a biker but omg please yes don't bike against traffic. I promise you I do not expect a biker coming towards me on the passenger side, especially where there aren't sidewalks or crosswalks.

(Mini rant: someone did that yesterday as I was waiting at the left arm of a T intersection to turn right down the trunk of the T. Dedicated right arrow, in a dedicated right turn lane. Dude bikes against traffic from the right arm of the T to the left, treating 4 lanes of traffic as his personal invisible crosswalk. One hand on the handlebars, the other waving his cigarette.)