Why wouldn't it be?Is IGA now considered as a boutique 24 hour supermarket?
The term boutique doesn't always mean fancy. An IGA could fit into definition 2 or 3:
1. a small shop or a small specialty department within a larger store, especially one that sells fashionable clothes and accessories or a special selection of other merchandise.
2. any small, exclusive business offering customized service:Our advertising is handled by a new Madison Avenue boutique.
3. Informal. a small business, department, etc., specializing in one aspect of a larger industryne of Wall Street's leading research boutiques.
Definition of boutique from Dictionary.com, the world’s leading online source for English definitions, pronunciations, word origins, idioms, Word of the Day, and more.