True dives are almost always found downtown. True dives have to serve liquor -- a divelike bar that doesn't is called a beer joint. True dives have to make you wonder what really pays the bills. True dives have to have really weird jukeboxes and have to open as early in the day as the law allows. True dives are often found on the ground floor of the sort of hotel that makes you hear mournful saxophones and think of Sam Spade. Charlie's fills this bill better than any bar in Houston.