I don't know what restaurants you frequent, but I can't think of anyone being okay with bringing outside meals or beverages. Probably you are just not kicked out because staff is not noticing or apathetic.

I only know of the concept of Corkage, where you pay the restaurant a fee if you bring your own wine to drink:

https://www.webstaurantstore.com/blog/2626/corkage-fee-guide...

> A corkage fee is the price charged to guests who choose to bring their own bottle of wine to a restaurant. Corkage fees usually exist at restaurants that already serve wine. The practice of allowing guests to bring their own wine is considered a courtesy to guests. … The average corkage fee ranges from $10 to $40 per bottle but may be as high as $100 or more.