I have seen just a floor box, centered on the table with a duplex recept and data/comm jacks that the tenant connects to.
I have seen the power/data wiring run up through the hollow end table support on a fixed in place table from a floor box that the hollow support fits over, with a removable panel for access.
I have not seen what any tenents 'arrange' from a floor box to the table top as far as protection from legs of those seated. Probably just cables hanging.
IMHO, your responsibility ends at the receptacle and jacks, not the utilization equipment.
Boxes? Try Carlon, they have nice dual use boxes, multi gangable & divided.