The length of the room is okay, it is the width that is interfering.

Keeping your table, you could do benches on each side and host/hostess chairs at either end. Or you could do a bench on widow side, host/hostess chairs on either end and chairs which tuck under the table.

I offer this photo as inspiration:

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In the posted photo, I love the benches….upholstered and more than one on each side.

Get out the painter's tape and try putting a settee on the clock wall with chairs on the opposite side of a narrow trestle table. Look into a small round extending table for larger parties.

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We rented a house with table space in the kitchen similar to this - did this for a week over several summers. The only real solution was to push the table against the wall, put one person at each end, and two on the open side. It was far from ideal.

From your post it sounds like this is the only table space in the house? If so, I would look at raising the window to where you can do a banquet seat on that side and then chairs on the kitchen side. While it may cost money now you will likely get it back in resale, as selling a house without one usable table space is going to be difficult. Are you planning to put seating at the peninsula? Because that will narrow you dining room choices even more.

I think tonyybaloney has the best idea above. Make the peninsula and clock wall banquet seating and have chairs on the other two side. Would that work in your space?

If you consider a window alteration I'd go with a deep bow with window seat to be used with larger groups and a table with a custom profile.

What if you rotate your table? 2 people sit on the clock side and 2 people sit opposite.

If this is the only dining table you have, you aren’t willing to give up the storage space in the peninsula and can’t redo the window, then I think you really have few workable options. The narrowest dining table I can find is 36”. You need a minimum of 3’ between the table and walls and that makes 9’ which you don’t have. Plus add the chairs and you really need another 6”-12”. You pretty much have to do like you said push it to one side and have seating at the ends and the other side, but unless this is your forever house I would start saving to redo the windows, or let go of the peninsula storage, because I think you will have a hard time selling a house without a room that allows a normal size table with seating on all sides.

How about a settee against the peninsula? You can put holiday decorations and special occasion dishes in the cabinet and move the settee when needed. You could even have a settee designed and custom made that would be the correct height. That or have the settee block part of the window.

like the corner settee idea.

Have two facing another two across from one another on a smaller rectangle. You could do a 3*5 table with 2 people with their back toward the clock and the other 2 with backs to the slider. This would leave room for a sideboard under the clock. [Check out this mid century set.[(https://www.houzz.com/products/gdf-studio-5-piece-katherine-fabric-and-wood-finish-dining-set-walnut-mint-prvw-vr~90735864)

Something like this across the whole window wall with white backed cushion against the window side. A less wide single/double pedestal table would make access easier.

I like this top in a narrow configuration. With metal pedestal legs.

Use benches, that will help a lot. Try that and if not sufficient walk around space, find a table that is narrower. We also had 7'10" (peninsula to back of bench in the right of the picture) and this is the setup with a 38 inch wide table. We have since changed out the chair backing to the peninsula for a matching stool so that the very popular charging drawer (behind the chair in the photo) can be easily accessed. That also allows access for walking through to the window bench, but honestly most people like to look out the window rather than sitting with their backs to it.

scrappy25 as I type this on my 54" round table with 6 chairs- I choose to face the slider to look out ;-)