Dominoes spots from one to six are generally arranged as they are on six-sided dice, but because blank ends having no spots are used, seven faces are possible, allowing 28 unique pieces in a double-six set. However, this is a relatively small number especially when playing with more than four people, so many domino sets are "extended" by introducing ends with greater numbers of spots, which increases the number of unique combinations of ends and thus of pieces. Each progressively larger set increases the maximum number of pips on an end by three, so the common extended sets are double-nine, double-12,
Les Double Six Les Double Six Les Double Six (also known as the Double Six of Paris) was a French vocal jazz group established in 1959 by Mimi Perrin. The group established an international reputation in the early 1960s. The name of the group was an allusion to the fact that the sextet used double-tracking techniques to enhance and 'fatten' the sound, very much like Brian Wilson of the Beach Boys did in the recording studio. The membership of the group varied from recording to recording. The six members would all sing once to a recording track, then sing the exact duplicate performance