Not Swarmable: maxi-scooters and modern Asian scoots.
Swarmable: twist & go modern Vespas
Most Swarmable: manual shift Vespas & Lambrettas
Beyond Swarmable: crazy and rare vintage scoots like Zundapp, Heinkel, Maico, Rumi, Mitsubishi Silver Pigeon, Fuji Rabbit etc.. Such a steed will win you great respect in the Swarm, and also endless jibes.