Not replying to emails for bookings

Hmm, there are quite a few Underground restaurants starting in London, a new one every week which is great. I am listing them on my blog.
However I am getting many complaints from people that these supperclubs cannot be bothered to reply to emails. I've experienced this myself.
I do think one has an obligation to reply. It does take time, it's true, which is why I set up a booking system with wegottickets.com. they take a ten percent surcharge but take a load of admin off my back.
But it can give the impression of snobbery which in my humble opinion is not what this movement is about.
Does anybody else have comments on this?