I'd turn it into a little business, like those guys who started the iWait service by offering to stand in line for people. I think, aside from a chair, small table, and sunshade, I'd have (for sale)

In the evening: a variety of airplane sized bottles of liqor + assorted mixers + paper cups

Energy drinks

Tea + hot water

A massage chair with a hired massouse (I'll take $5 off the top)

A bunch of $1 keychain lights I'd sell for $2 a piece.

Sorry, couldn't resist. Hey, you could probably sell a lot of stuff to bored, tired people with money to burn.