About the lack of a parking lot scene...
I live in LA and I've been several rock shows at The Bowl over the years and the park is the place to be for preshow libations and entertainment. In 2011 the park just across the street was going off like wild Shakedown Street, the tanks were out in the open, balloons were flowing, handles of hard liquor in the open, beer, wine, blunts, bongs, etc.....and the fellas in Blue were just strolling around amused by the silly hippies having fun. Of course, you should use your best judgement and read the scene like you would anywhere. However, if it looks good you can let your hair down and party like its 1999