longest elevator “system” - meaning a network of escalators. The longest single unbroken escalator is in the St Petersburg Metro. Also, the previous longest system is also in HK, outdoors in Ocean Park.

most are great air cleaners too, according to NASA

I imagine a sports MMORPG where players play individual athletes that join teams, play games, compete, and level up stats and skills. Then, at some level, some can branch off to play as managers, coach, etc.