Seven uses of a Sarong

-towel
-provider of modesty in communal bathing and/or changing situations
-skirt
-bag
-sunshield
-sheet
-headscarf

Baby-sling is also possible, but I haven't yet had the opportunity to attempt that as yet!

I feel that a South-east Asian amendment to the Hitchhiker's Guide recommendations is in order:
"Always carry your sarong with you..."