The expected values of almost all kinds of straight flushes fall in between a royal flush without an Ace and a flush with three high cards. Only double-inside straight flushes with one or no high cards do not. Let's try a few examples. You're dealt the Seven and Eight of diamonds and your options are the Nine of hearts and the Jack of diamonds. You're dealt the Eight and Nine of diamonds and your options are the Ten of hearts and the Jack of diamonds.
Sands also has dollar and five-dollar Pick 'Em.