We were a party of 2 at the JBJB party last year and shared a table with 2 other guests.
We had previously shared tables a few times at the Epcot dessert party and didn’t mind it at all - we actually really enjoyed the brief chit chat while waiting for the show, swapping theme park stories, etc. We’ve lucked out with fun people.
Not going to lie, didn’t totally love the shared experience at JBJB. Not sure if it was the setting (we thought the tables were pretty small), our table mates, or that DW and I were on a rare solo trip and were more wanting to enjoy the time together...just didn’t have the same feel as our prior shared experiences. Hard to explain.
I haven’t kept up with if we expect the same possible shared tables setup for the JBJB dessert party this year, but I ‘assume’ it will be (although not sure about that).