We should all learn from Avrohom Avinu 2 things:
1- Never turn down an opportunity to perform hachnosas orchim.
2- Upon entering a society of perverts he put his wife in a box.
I personally would follow Avrohom Avinus example and put my teenage daughters in a box every time I have potentially perverted (hey ya never know) teenage boys over for a seuda however, its quite impractical since they can’t serve & clean up while in a box. Therefore I just insist they wear a loose fitting radid or hijab with only their eyes showing (I’d insist that they cover their eyes as well but I’m afraid they may spill the soup on my lap or miss some crumbs while sweeping.) They also wear surgical gloves lest the boys gaze at their etzba k’tana which chazal warn against. (The gloves are also helpful for cleaning up and doing dishes.)