Step one: Call in the finest structurally engineered engineers available
Have them conduct a load test on the bar counter.
Next check the clearance between the counter and the joist.
Check that the joist is correctly seated.
And check the counter is free of splinters.
Ensure the height of the counter leaves everything within easy reach.
It's a tedious job I know but an HSE requirement in order to get my Building Certificate. Another tick in the box.