Alexandre resto suspended 30 days

Speaking of mobs and restaurants, Alexandre on Peel is facing a thirty‑day shutdown over a list of issues: allowing known mobsters in, staff dealing coke, and breaking Covid rules in 2021. It is not the first time the establishment has found itself in hot water.

I’ve never worked in the restaurant biz. How does a restaurant maintain controls on banned individuals, given that turnover of staff means servers might not be familiar with specific people?