At Washington Park in Denver you can rent various types of vehicles. This one is built for two, but there are others built for 4 (or more). Somehow I don’t think having 4 people peddling is twice a good as two.
This one did great on the downhill, but uphill was a challenge.
This is another of my favorites – This might also pass as the company moving van – complete with the driver?
The driver may have to get back to you personally on that.