In A Midsummer Night's Dream, where do the Mechanicals perform Pyramus and Thisbe during the wedding?
During the wedding do the guests watch the performance of Pyramus and Thisbe outside or inside, in a sort of big theatre?
The truth is we aren't actually told the answer to your question in the text. Act V scene 1 makes no reference to the location of Thesus and Hippolyta in this scene, and whether the festivities that Theseus is so eager to help pass the time before bedtime are performed inside or outside. In his speech calling for entertainment, Theseus makes no reference to setting:
Come now, what masques, what dances shall we have
To wear away this long age of three hours
Between our after-supper and bedtime?
We thus are told the time when the play occurs, but not the location. This, like so many other issues, we have to infer is left up to the director of the play, who must choose whether to have the performance of the Mechanicals staged outside or inside. As always, what a director needs to decide is what would be added by having it outside and what would be taken away if it were to be staged outside.