I don’t know of a place in Boro Park, but I do know of a place that comes and picks up bags of clothing (criteria: Clothing all in a big black garbage bags – I think 5 bags is the limit, per pickup) I’m pretty sure that it is a Lubavitcher organization that runs it. You call them, and set up a day that they will come and pick up the bags of clothing. If you want I can try and find out the number.
Bais Yaakov Park always has a massive clothing drive where you can drop off stuff. I could try to find out when they’re having their next one if you want