Formal — to staff
Ryokan · Hotel
You
すみません、この浴衣とスリッパは、部屋の外でも大丈夫ですか？
すみません、このゆかたとスリッパは、へやのそとでもだいじょうぶですか？
Excuse me, are this yukata and slippers okay to wear outside the room?
Romaji: Sumimasen, kono yukata to surippa wa, heya no soto demo daijōbu desu ka? / Reply Romaji: Hai, o-furo ya shokuji kaijō, kannai wa doko demo daijōbu desu yo.
Reply
はい、お風呂や食事会場、館内はどこでも大丈夫ですよ。
はい、おふろやしょくじかいじょう、かんないはどこでもだいじょうぶですよ。
Yes, they're fine for the bath, dining area, and anywhere inside the inn.
Gesture & etiquette
Pointing at the yukata and slippers.
When wearing a yukata, always wrap the left side over the right. Wrapping the right over the left is for deceased persons and considered very bad luck. You can typically wear yukata and slippers within the ryokan's common areas but not usually outside the building.