No vacancies - in the window of a hotel. It means that the hotel is full.
beware of pickpockets - a waiting area in a busy airport
nothing to declare - in the airport
please queue other side - in a bank or post office
out of order - for a machine that is not working, f.ex. a phone machine
sold out - outside a cinema or concert
fragile - on a box with glass
keep off the grass - on/near grass lawn