if you dont consider future use of the room to keep the existing floor
tile intact, just use masonry drill of appropriate size to drill for
expansion bolts into the concrete subfloor. use threaded studs that you
can then run up through the bar foundation

if you ever do want to move the bar and dont want to go hunting for
exact tile replacements after the drilljob above, then use a good
quantity of fast setting cement (fastplug?) to create an island of mass
large enough to prevent the bar from walking away from its location.
you may be relying on the ceramic tiles adhesive to prevent movement,
but they should not be expected to move regardless.

or, remove a couple tiles before drilling. either way, your result
will be determined by just how permanent you want the job to be.

& certain construction adhesives have extreme resistanse to shear force
if applied properly. (consult with the homely depots associates if
required)