Could one be looking to host a party here?  Could it be trying to advertise someone to host events, but on boats or in cars only?  (It would have to be a big car.)  But hosting a party on canvas?  I guess they think that they are the host with the most so they are hiring themselves out.  At least I think is what they are trying to do.  I mean, they did not say upholstery did they?  They specifically said uphostery.  Rule one when advertising a service... Never do a serve that you can't spell.