What is the opposite of 'cozy'?

I'm trying to find a word to describe a restaurant space that is the opposite of cozy. The only word I can think of is cavernous, however I don't wish to give the sense that the space is particularly large. It's simply that it is not cozy.

Solution 1:

If you are trying to get ta contrast to 'cozy' with respect to comfort, then

sparse

would satisfy, without implying anything about the size.

Another word with the same feeling, same sound, but way different provenance is

spartan.

Solution 2:

I think OP has a slightly distorted understanding of the word cosy - it's an almost accidental connotation that cosy places are often quite small.

The key sense is comfortable, warm, sheltered, intimate/friendly, which also normally implies soft lighting, plush furnishing, relaxing background music, etc.

When referring to a "non-cosy" restaurant, it all depends on whether you want to be positive...

bright, spacious, lively, airy, bustling, popular, buzzing, flamboyant, etc.,

...or negative...

brash, flashy, loud, garish, gaudy, noisy, etc.

Solution 3:

If you mainly want to give the impression that the space is not as comfortable as a cosy place, without implying anything about its size, you could use cold or uninviting.