The main use of storage space on Stashbee is to store your items. However, you can enquire directly with the Host as to whether or not they will let their space be used for work purposes.
Some spaces will show 'Usage' as 'Workspace', so it is worth checking the listing before chatting to the Host.
Most Hosts do not allow vehicle detailing or pedicabs in their spaces as this can cause a lot of traffic and mess in the spaces.