Just about a 3 minute walk from the Shangri La Hotel I found Wilavan Laundry. They were very affordable, very friendly, and laundered and pressed my clothes in the same day. Open daily from 7:30 AM - 6 PM. Telephone is 02-6309330. Street address is 56 Charoenkrung 44. If you find the Shangri La Hotel's laundry (located outside of hotel and much more expensive), you're about a one minute walk from Wilavan Laundry. Good luck!