I went to Groovy Lube for the last time this past April. I brought in an older Mercedes for an oil change. They were polite enough at the beginning, but the real problem started when I came back to get the car. I noticed they hurried me through paying for the service, didn't say a word about what they did, then quickly gave me my receipt and the form with the notes about the work. When I got home, I noticed a handwritten note saying that my car had "major leaks". At no point did any Groovy Lube employee tell me about these "leaks". Funny thing though, the car had no leaks when I brought it in.
What's even better? The car didn't actually have ANY leaks. I had the oil changed in preparation for a cross country move, and drove the car well over 1,000 miles without any issues over the next few days. There was some oil that burnt off the engine from driving, but it eventually stopped, and I imagine it was just oil they spilled on the engine.
My theory is that they banged up the car a bit (it's pretty low to the ground) when driving it into the garage, saw the oil they had spilled on the engine, and thought that they had caused a leak somehow. So, being the dishonest, unethical shop that they are, they rushed me out without a word and hoped I wouldn't notice until I got home. Which is what happened, except because they're so incompetent they didn't realize that they didn't cause any leaks, they were just sloppy and careless.
If you're down with unethical, dishonest business practices, give Groovy Lube your business. I can't say that the owner espouses these practices, but the employees didn't seem to have a problem with the situation.