Psychedelic poster advertising a gig for the band Big Brother and The Holding Company, featuring an image of a hotel desk clerk wearing a key around his neck. Behind him are pigeon holes in which stand letters and hang keys. Printed in pink, green and orange. The band's name is printed in the upper left corner of the design, 'Big Brother & the Holding Co.'. Below the main image are the venue details, 'Jan 31 Tues Sun Feb 5, Matrix 3138 Fillmore, 5670118, San Francisco, Near Lombard. Minors Welcome'. All lettering is highly stylised.