Friday night, Opera-Off

We've known about this for some time, but it'll be interesting to see what happens Friday night, when both Boston Lyric Opera's "Thais" and Opera Boston's "Lucrezia Borgia" open.

Opera Boston and BLO's leaders have pledged to keep this from happening again, but for those of us without a financial stake in the productions, it'll be one more interesting case in the ongoing "how hungry are Bostonians for arts events" study. Will opera lovers see two productions in one week?