Have two bikes, one decent road bike and another hulk of a cruiser that can't be seriously damaged and is too ugly to be stolen. Both needed tune-ups and I found a Groupon for Las Vegas Cyclery.
They made the whole process easy. No griping about the Groupon. No snide remarks about my beast with the rusty chain. No crap about helping me load the bike. No issues. Friendly, easy service at a reasonable price. (Even without the Groupon)