As neat as that would be you will most likely end up with 6 other people. Each swim has 4 groups A-D, and each group has up to 8 people. When assigning times they make sure to fill in each swim to the max (unless there is an odd number, then you might have 6-7 people in a group or something like that), it is based on how many guests are in attendance. On a day there are only 250 guests they will cut out the number of swims and condense down to 2 or 3 swims per pool, or close down an entire pool so as to fill each time slot.