I think The Harbour Cafe is really the best place in Margate for decor. It's situated on the ground floor of a lovely grand old building, The Royal York Mansions, on the Parade, situated next to the Harbour on The Parade. The owners renovated it from a regular pizza takeaway place about five years ago. It's stripped back bare brick walls and raw floor boards. It's got a slightly vintage feel that isn't trying too hard.
The fave things on the menu are the homemade burger and fat hand cut fries. The Sunday lunch is good. The deserts are lovely, fresh fruit tarts and if they have it in the wonderful chocolate tart.
If they ever closed I'd be lost for somewhere to have an afternoon coffee and cake. They're also dog friendly.
Royal York Mansions 10 The Parade Margate CT9 1EZ 01843 290110