The phrase "comfortable groove" refers to a state of being in a rhythm or routine that feels familiar, easy, and relaxed. It implies feeling at ease and content with one's current situation or way of doing things. Full definition
For me, it was a matter of falling into comfortable grooves, revisiting powerful experi (goodreads.com)
The actors aren't tested or challenged, necessarily, but they're playing in comfortable grooves and there's a lot of satisfaction in watching the results. (chicagotribune.com)
It wasn't till around 4 months that we really settled into a more comfortable groove. (noobmommy.com)