Excuse me . Is anyone sitting here ?   No , nobody .   You don ’ t mind if I smoke , do you ?   Well , to be frank , yes , I do .   Oh , I ’ m sorry . But this isn ’ t a no-smoker , isn ’ t it ? I mean would you mind if I smoke here ?   Actually it is . Perhaps you haven ’ t noticed the sign .   Sign ? What ’ s sign ?   There , on the window .   Oh , sorry . I didn ’ t notice it . Sorry .   That ’ s all right . 