On weekends we enjoy going to the drive-ins, where watching movies from our cars is very comfortable.

drive-ins 是由动词短语 drive in（开车进入）加上连字符和复数后缀 -s 构成的名词，指"可以开车进入的场所"。在这里特指"汽车影院"，即观众可以坐在自己的车里观看电影的露天影院。