I would call it 'Insurance'.
Once you have found someone who you want to spend the night with, if you are full of piss and wind and up to your ears with grog, then its a shame to get them washed and stripped and not be able to poke them.
For an extra 200 baht you can buy 'insurance' - guaranteed to raise the dead from any mother fcuker of a drinking session.
Why risk a bar fine plus a minimum of 1,000 baht ?
Go 'mob handed' and do the job properly
