If the Hermes-in-the-the bar framing device were used, it might be nice if after the 'Road to Hell' reprise, 'I Raise My Cup To Him' then occurred in the same bar. Ie, we see that Eurydice and Persephone have been in the underworld bar all along, listening to their own story being retold again. It wouldn't need to be a big OMG moment or anything, but it might be a nice touch.