Private Game

A man phones up Cliftonville Football ground and asks for twenty tickets for Saturday's game.
'Twenty?' says the club secretary. 'Are you sure you didn't want Linfield or somewhere?'
'Oh no,' says the man. 'Cliftonville it is. Can I get the twenty tickets all right?'
'Of course you can.'
'And what time does the game start?'
'What time can you and your friends get here?'