Expense for starting a business

A lot of businesses an sales discussions and strategy, are done over meals and drinks.  Meals are 100% deductible when it is from a restaurant.  Is there a limit of how much you can expense annually for food and drinks?

 

Can you also claim the mileage that you drive to meet a client at a restaurant to discuss business?

 

Can you also deduct 100% an uber or taxi that you take to meet a client to discuss business?

 

If you travel and fly, and stay at a hotel to meet a client, can you deduct 100% of the hotel cost and 100% of the flight?