Most of the casinos I visit have $5 3/2 tables. This includes pretty much everything Off-strip, except for the Golden Nugget which never goes below $10 minimum. 4Q only had $5 on 6/5, possibly Binions and Fitzgerald's also.
However, finding a seat can be difficult at times. On my visit last week, $5 tables were usually full in the evenings with folks standing around waiting for seats to open. Despite that, the PB's would not open more tables, so we'd move on.