There is an intersection in my commute where there is always a long line of cars waiting to make a right turn and they tend to spill onto the bike lane. If it's really hairy I get on the sidewalk and bypass them. More for my safety than anything else really. I don't want to get in line on the turn lane too because I know people on their way home after a long day are irritated and the last thing they want to see is "a bike getting in their way".