We love a party bus! It arrives at the church and takes the bridal party to the reception safely to enjoy all of the wedding festivities, aka, alcohol. We love riding on the party bus - you just really never know what footage you will get!!!
There are many great reasons to hire a bus, shuttle, etc. You have the obvious, carting around the wedding party, that may or may not be drinking. Helping out of towners get to the destination without getting lost. All great things!
But remember after the wedding - after you and your spouse leave the reception. The wedding party that may or may not have been drinking, may or may not be able to drive themselves from the reception back to the hotel. It might be a good idea to have the party bus come back and pick everyone up to take the back to the hotel. That way everyone gets home safe and sound.
Here is a party bus by Rare Transportation! It's off in the distance, but it's there.