冠词的用法题the smiths don't usually like staying at-hotels

冠词的用法题the smiths don't usually like staying at_hotels此空为何不填?at hotels有这样的说法吗,我只记得有at hotel啊,网上也没查到,有人用at school,at night,stay at home来举例解释,可是这里是复数啊hotelsstay at home我当然熟悉,但这里hotel是复数啊,有过stay at homes的用法吗?at school,at night 我都知道,但是这里hotel是复数啊,有过at nights或者at schools的用法吗?