The reason they call them boiler rooms is, if you are selling stocks by telephone there's no reason to rent a nice office, so you get the cheapest -so you put a whole bank of telephones in the cheapest place.

它之所以被叫做锅炉房是因为,如果通过电话进行买卖交易,你没有必要去租一间漂亮的办公室,于是你租了最便宜的出租房,然后在那儿放满电话

耶鲁公开课 - 金融市场课程节选