[T-A]

Dexter, of Dexter's Laboratory fame, thought of it (of course). See "Morning Stretch": https://youtu.be/DWU5U8NxeCA?t=33m32s

In view of all the complications he discovered, maybe a room (or house) which simply stops biological aging of those inside would be preferable... at least until the government starts taking notice: https://en.wikipedia.org/wiki/Way_Station_(novel)

In stories connecting different worlds, time sometimes runs at different rates. A classic example would be the Chronicles of Narnia: https://scifi.stackexchange.com/questions/94204/how-much-tim...

Of course, to somebody living in a world where time runs fast, venturing out into the "normal" universe would be equivalent to stepping into your imagined room. This happens in one of the better Star Trek Voyager episodes: https://en.wikipedia.org/wiki/Blink_of_an_Eye_(Star_Trek:_Vo...