I agree with the above.
After three I'd do my best to come up with an excellent way to let them know I'd love to have the gig, but they need to decide either yes or no. I'd say something along the lines of, "You know what I can do, if you decide you want to work with me, call any time." No need to throw in anything like, "... though I might be unavailable.". I think NOT saying something like that actually works better in a certain way. I also think that cutting them off after three, with complete confidence, shows a level of professionality.
I would also let them know that I would be able to do anything they wanted me to do, in a timely fashion. I like for bands to know I'll be the easiest to work with. And I would do my best at my last audition to make sure I kicked everyone else's ass, in every way possible.
In the gig I landed in January (the best paying gig of my life) I was told I wouldn't have to audition for months before the old bass player left. They were hiring me based on my reputation and recommendations. A week before I was going to "rehearse" with them for the first time, they told me the plan had changed. Someone in another band doing the same material had just become available, and some other guys popped out of nowhere that the rest of the band were interested in using. While that sucked for me, it also pumped my adrenaline. I put in double time on learning tunes and making sure I nailed everything. I knew the material to the point where I didn't have to think about notes, and I could focus on groove and feel. The extra work got me the gig.
Good luck. I lool forward to hearing the update!
I had a somewhat similar experience, it just took longer to play out. I'd auditioned for a working band, all guys with big résumés, and it had gone over very well. Then they called me and said they'd hired another guy. The keyboard player stopped by my day job to tell me they'd taken a guy they'd known beforehand, and said "He knew our book, every bit of it." I agreed with him that that was the sensible thing to do, and went on with life. Several months later, they called me and asked me to audition again, because the guy they'd hired was "too high maintenance." At first I was sort of put out that they wanted me to do it all over again, but I knew it was a good gig, so I put my ego in my pocket, and went back. Four songs in, the leader looked at me and hollered "You're in!" and that was that.




