Mr. and Mrs. Astor, Mr. and Mrs. Blake, Mr. and Mrs. Crane, and Mr. and Mrs. Davis were seated around a table as shown:
+---+
| 1 |
+---+ +---+ +---+
| 8 | | 2 |
+---+ +---+
+---+ +---+
| 7 | o | 3 |
+---+ +---+
+---+ +---+
| 6 | | 4 |
+---+ +---+ +---+
| 5 |
+---+
1) Mrs. Astor was insulted by Mr. Blake who sat next to her on her left.
2) Mr. Blake was insulted by Mrs. Crane who sat opposite him across the center of the table.
3) Mrs. Crane was insulted by the hostess who was the only person who sat between a married couple.
4) The hostess was insulted by the only person who sat between two men.
Who insulted the hostess?
I came up with a slightly different solution that seems to work.
Mr. Blake - chair 1, Mrs. Blake - chair 2, Mr. Crane - chair 3, Mrs. Astor - hostess - chair 4, Mrs. Crane - chair 5, Mr. Davis - chair 6, Mrs. Davis - chair 7, Mrs. Astor - chair 8
Looking at this the positions match up the clues.
Mrs. Astor sits in chair 8 and looks towards the table. This makes Mr. Blake sit on her left, satisfying clue 1. Mrs. Crane sits in chair 5 which agrees with clue 2. The hostess - Mrs. Astor is the only one sitting between a married couple and only one person sits between 2 men. So the answer according to this solution is Mrs. Blake insulted the hostess.