Ahh - so there is still alcohol in Dubai in Ramadan:

"Bars in Dubai are usually still open but patrons will be asked what religion they are and refused entry if they are Muslim. Live and loud music is banned, so is dancing, so most nightclubs in Dubai will be closed or very quiet. Bars in Abu Dhabi might be closed. Bars in Ras Al Khaimah usually stay open. Bars in Sharjah don't exist."

http://www.dubaifaqs.com/ramadan-in-dubai.php

I wonder which are the bars in Dubai that will be closed altogether?

Still, it would be a bit annoying there being a tourist and not being able to get a bite to eat during fasting hours. It's not as if you can come home in the afternoon and make lunch.

On the up side - the hotels over there must be really struggling to make any money. Check out how cheap their Iftars are compared to Doha:

http://www.dubaifaqs.com/ramadan-dubai-2009.php
Just 1 example of Dubai's broke hotels:
Burj Al Arab - for those ready to spend up large, they offer Ramadan buffets for AED 290.