英文文法更正 - 微笑不是那種職業性裝出來的微笑

我按照你大概的意思重寫, 參考看看囉:
No matter if you are in a hotel, restaurant, store or even at a roadside stall, the waiters that you see are all very enthusiastic and courteous. The genuine smiles beaming on their face, unlike those occupational smiles, make you feel so kind and sincere. You can tell and feel that those smiles simply come from the heart.

Errors and Corrections in only one sentence in English Grammar:-
Whether it is a hotel or restaurant, roadside stalls,street vendors or shops, staff groups were very kind,modest to let people feel simple and sincere, unlike those professional fake smilers !