[MicroBob]

football season?
Diamondbacks fever?
tourney going on in LA?
promotion at a competing casino?
other reasons?


overall I feel like such things tend to go in waves.
If there were several people who had to sit around for a long time and wait for their name to come up on the list then their experience isn't going to be as enjoyable and they will be less likely to come running back the following week.
When things get over-crowded like that I think some people tend to only have so much patience for it so it will tend to balance out and be kind of self-balancing.

In other words, if they had more room and more tables there so that nobody had to wait perhaps the demand would have remained high.