Mariachi in front of the plaza to flag down passing cars. In 2010, the government renovated the plaza to make it more tourist-friendly, adding new paving, gardens, police, security cameras, painted facades, and a museum dedicated to mariachi and tequila. Although mariachis can be hired in Mexico City over the phone or on the internet, many people still prefer to come to the plaza, hear the musicians and haggle over the price. About 2,500 mariachis hold union cards to work in the plaza, but as many as 4,000 may circulate through on a busy weekend. The size of a Mariachi group
Mariachi varies depending on the availability of musicians. The usual mariachi group today consists of as many as eight violins, two trumpets and at least one guitar. Traditional mariachi guitars include the vihuela, a high-pitched, round-backed guitar that provides rhythm, and a bass guitar called a guitarrón, which also provides rhythm. Sometimes a Mexican folk harp provides bass and ornaments the melody. All are Mexican variations of European instruments. There is generally no lead singer as in other kinds of group with all players singing choruses and taking turns singing the lead. Often the lead singer is assigned to a certain