I have seen this a couple of times. Most recent was in December in Disney Explorers Lodge, Hong Kong.

Source: https://steemit.com/photography/@ace108/a-good-morning-in-hong-kong-or-hk026-by-ace108
I think it's nice convenient and thought I want one but not going to rip out anything. So, next best thing is I have this Targus extension cord:
https://www.lazada.sg/products/targus-smart-surge-4-extension-cord-with-2-usb-ports-i3466538-s4361637.html?gclid=CjwKCAjwoMPcBRAWEiwAiAqZhyEEXxw_y7CN2styUb--OZSuB6sqaD8YoC7amXhWH-jLgaecbMf-pRoCUZAQAvD_BwE&s_kwcid=AL!4281!3!271764288885!!!g!!&utm_source=google&utm_medium=sem_non_brand&utm_content=454174933119_4361637_124041469&utm_campaign=[SSA-260000000000-00000-00000-0]:%20Top%20Tools%20DIY%20and%20Outdoor&utm_term=[SSA-260800000000-00000-00000-0]:%20Top%20Electrical_xxso0000000at2608_c_pla-454174933119&adjust_tracker=t2v78t_5n20iw&adjust_campaign=1413990191&adjust_adgroup=58382186391_c_pla-454174933119&adjust_creative=454174933119_4361637_124041469&tracker_limit=1000000&ef_id=WtiuhgAAAbPCD8Fc:20180906141924:s