Yes, you can be a cruiser and a racer. However there are some pit falls one needs to be aware of, like a BBQ on the stern rail. The racers will not take you serious. With out the BBQ the cruisers won't take you serious. Yes It can be confusing, like raising the yellow protest flag to a passing powerboat who forces you alter your course and then you realize your not racing.
Another one to watch out for is the urge to yell starboard tack to any sailboat with in 100 yards of you.
If you can keep these things in check you will be OK.