As a sightseeing suggestion to my out-of-town friend, I want to say there's an exhibition he might be interested in checking out.
Option 1 below sounds too formal to me, so I'd like to know if Options 2 to 4 are grammatically OK.
- A kimono exhibition is held at MoMA.
- MoMA is having a kimono exhibition.
- They are having a kimono exhibition at MoMA.
- There is a kimono exhibition at MoMA.
Thank you in advance for your input.