I've never played in a band or had an audition, but I could guess that considering millions of other guys in the world want to be professional drummers that make enough money to sustain a living, you really have to be good and stand out, both.
Networking is everything. Go out and find the best bands in your area and give them your card should they ever need a fill-in. Also, try to sit in as much as possible with groups that are open to having sit-ins. Don't be that guy that begs and says he is a drummer and wants to show off to the girlies. Make sure you nail the gigs you get and don't give yourself a bad rep.