I am throwing a 50th bday party for my mom but I don't know where to throw it.?

I've been looking at hotel banquet rooms but I want to bring in my own food and alcohol. Does anyone know of spaces to rent where you can bring your own food and alcohol because all the places I have seen have had to be catered by them and will not allow you to bring in alcohol. And all the restaurants are so expensive. And I am looking for anything in the tri-valley area of California, like Pleasanton, Dublin and Livermore.