The office and studio for Mario's Alterations is located on the fourth floor of an office building in Beverly Hills. Despite its hard-to-find locale, regulars have been flocking to Mario's for 20 years. Mario himself is a full-service tailor who also makes suits and formal attire for men and women with luxury fabrics -- including cashmeres and linens from Great Britain, Scotland, Italy and France. Mario can also handle basic alterations, mending and fabric weaving.