Double-swinging doors are still used in restaurants today – they can be used with your hands full.
Saloon doors did exist. The design allowed ventilation and cross-breezes (before AC) to keep the inside cool and air out smoke or other smells. It also allowed people to hear and see the place was open, much like how modern shop doors are made with glass.
If you Google “saloon door history” you shoild find some good articles
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