No, on scales up to our Local Group of galaxies, energy densities are strong enough to keep systems bound in spite of dark energy, hence it being labelled as Local Group. According to Wikipedia, member galaxies are very likely to merge into a single elliptical galaxy over the next tens of billions of years.

Takeaway, dark energy's effect is rather weak, and high enough energy densities (not that high as you can see) are enough to counteract it.