I go between Penn station and WTC pretty much every weekday. On the mornings, I usually can't find a bike on 33rd and 7th, either I would wait, head toward 31st and 7th, and if nothing is there, go to 27th and 7th, where there usually are bikes. On reaching WTC area, I would try to dock at fulton, but lately, the docks are full, so I head toward Barclay st, where frequently there is no dock either. I sometimes just wander dock to dock until I find a slot (very unlikely, but I like to keep moving), or wait for one to free up, which is usually within 5-10min. In the evening, I head back the reverse way. I usually find bikes on Barclay near WTC, but when I reach near Penn station, the docks are usually full on 33rd and 7th. I could swing by 31st and 7th, but if that is also full, that means I probably missed my train, which I did once in the last couple of weeks.