stuffy(FORMAL)disapproving
The spa has the unstuffiest atmosphere of any in the UK.
This is a refreshingly unstuffy luxury hotel with an excellent restaurant and great location.
The rooms are reminiscent of a well-to-do but unstuffy country house.
Whilst the public areas are decidedly grand, the atmosphere is unstuffy.
The inn remains surprisingly unstuffy and not particularly expensive.
Staff are relaxed, unstuffy, and eager to please.

SMART Vocabulary: related words and phrases

Manners & levels of formality
button-down
buttoned-up
casualization
ceremonious
ceremoniously
formally
genteel
genteelly
genteelness
gentility
grace
non-formal
non-U
not the done thingidiom
over-familiar
propriety
solemnity
valediction
valedictory
without ceremony