With the darkened windows you can drink, smoke, explore mysterious asian sexual practices and just generally have a great time. The Limo can take you around town, dropping into the best bars in town.
Sadly, pleasures like this don't come cheap, but hey the main squeeze gets married once (hopefully) and wont be able to afford luxury for a long time... so don't stint, recline in soft leather luxury, let your black satin shirts create some static electricity..
See also:
Club Class Party Bus