When there are a lot of people in the wedding party, and there is going to be a rehearsal party, it would be good to rent a bus so that after the rehearsal everyone just gets onto the bus and goes to the party. No worry about driving, giving directions etc. This is especially useful for people from out of town and they are all staying in the same hotel since after the party all can be taken right back to the hotel. Eliminates getting lost and also any fears about having a drink at the party.