I posted this in the Light Pollution section after someone asked the same question too. I will gladly post it here.

The Astronomy League's Urban List is a good one. However, I have beeb able to see objects that are not listed as being visible in a urban sky. They were M53 and M79. M79 is further south than M53. M79 is one of the more difficult Messier and globular cluster. At the time, the seeing and transparency was really exceptional despite the light pollution. Also, a cold front had passed.

Hope it helps.