Table minimums tend to be a fluctuating thing. The time of year, the time of day, the day of the week, the game you are playing, the number of people in the casino and how much they are betting all affect the limits. All that being said, the best places to find $5 tables would be at the North end of the strip in the late morning hours (i.e., 7:00AM- 10:30AM) on weekdays. That is a general statement, however. I have also seen $5 Pai Gow and blackjack at the Luxor on weekdays as well.