Below is an instruction that describes a task. Write a response that appropriately completes the request.

### Instruction:
Which zone has max capacity of 23 in a group under 2 at Robbers Roost?

### Inputs:
table_name: table, columns: ['Area', 'Name', 'Zone', 'Group(s)', 'Parties', 'Max People', 'Camp Type']

### Response:
SELECT Zone FROM table WHERE Max People > 23 AND Group(s) < 2 AND Name = robbers roost