All-time most important service providers? Easy: Shrink. Mechanic. Butcher. Baker. Candlestick maker. (Hey. You’re a romantic.) Oh, and duh. Tailor. Need a good one? Try Hamza Simrick, who operates an excellent alterations business out of his atelier. Trained in the bespoke arts in Paris and London, Simirick wrote the book on tailoring (literally — he authored a textbook on the subject once). Having worked on Savile Row and even done custom work for Burberry when it was still a tiny one-shop operation, he now brings his know-how to your dresses, tops, and jeans. Too tight? Too long? Too big? Too wide? Simirick’s got the solution. Plus, his disarming old-world charm will always bring a smile to your face. Talk about a service that’s really hard to come by. Hamza Simrick, 574 South 23rd Street, Arlington (703-521-6909).