I'm not in the habit of trying to take another drummers gig. If anything, I will speak with the band and just let them know I enjoy the music and if they find themselves in need of a sub at some point to give me a call, and I leave it at that. The best way to land a gig is to make sure the people within the group, and/or surrounding them know who you are, and that you're fresh enough on their mind to call you first. It's not who you know, it's who knows you. The vast majority of work I do is 100% based of recommendations, and not auditioning.