'Shall we go?'
Shall is a word which is commonly used in British English, but rarely in American English.
Shall can be used in a number of contexts:
Shall is often used with 'I' or 'we' instead of will:
'I shall call you later.'
'We shall talk about it tomorrow.'
'We shall never forget you.'
'I shall take care of your dog.'
'Shall I buy it?'
'Where shall I go?'
'Shall I close the door?'
'Shall we go?'