When I get mine, I don't think I'll use it in a restaurant where the tables are so close together that it would get in the way of other people.
I would probably keep it hanging on the side where I am sitting so it doesn't get in any one else's way. I can't really think of any restaurants that I eat at regularly where there isn't enough space for me to comfortably hang up my purse without getting in someone's way so I doubt it will be a problem. I guess it just depends on the restaurant and how it is laid out.
I just ordered two from couturecaddy.com! One for my mom and one for me.
I really liked the luxelink ones, but the shipping to Hawaii was $10. That's a lot considering the hook itself was $35.
From couturecaddy I got two purse hooks shipped for less than $25.