All of the pedalers will be feeding into a 5/8" keyed shaft. They'll all be on one side in this arrangement. Everyone will be seated at a fully functioning bar while they pedal, hopefully buying drinks and having a great time. I'm not sure how many pedalers I need. I'm going to knock together a prototype to demonstrate the principle with 2 pedalers, but the final bar will probably need something like 6 or 8.