Well, I have an apartment at 25th and 2nd so I’m often in Chelsea because it has good shopping - at least when disgruntled employees are not shooting it out at Home Depot. I only go into Williamsburg to eat at a red sauce restaurant there - I’m still looking for the hipsters in that neighborhood since it always looks like a 19th century factory town gone wrong to me. The under 40s I know are generally too poor or middle class to be eating much at Eataly or hanging with the judges on Chopped.
Take the L train to Bedford Avenue and walk in any direction. Hipster central, although “true” hipsters are moving to Bushwick due to (for now) lower rents.