Act I
Scene 1
Athenians (Theseus, Hippolyta, Egeus)
Lovers (Hermia, Lysander, Helena, Demetrius not in this scene)

Scene 2
Troop  (Quince, Snug, Bottom, Flute, Snout, Starveling, Julia)

Act II
Scene 1
Older Fairies  (Puck, Fairy, Titania, Oberon)
Lovers  (Demetrius, Helena)

Scene 2
Older Fairies (Titania, Oberon, Fairy)
Younger Fairies  (Pease-Blossom, Cobweb, Moth, Mustard-Seed, Pinecone, John Tataryn)
Lovers (Lysander, Hermia, Lysander, Helena)

Act III
Scene 1
Older Fairies (Titania, Puck)
Troop (Quince, Snug, bottom, Flute, Snout, Starveling, Julia)
Younger Fairies (Pease-Blossom, Cobweb, Moth, Mustard-Seed, Pinecone, John Tataryn)

Scene 2
Older Fairies (Oberon, Puck)
Lovers (Hermia, Demetrius, Lysander, Helena)

Act IV
Scene 1
Older Fairies (Titania, Oberon)
Younger Fairies (Pease-Blossom, Cobweb, Moth, Mustard-Seed, Pinecone, John Tataryn)
Bottom
Athenians (Theseus, Hippolyta, Egeus)
Lovers (Hermia, Demetrius, Lysander, Helena)

Scene 2
Troop (Quince, Bottom, Snug, Flute, Snout, Starveling, Julia)

Act V
Scene 1
Athenians (Theseus, Hippolyta, Philostrate)
Troop (Quince, Bottom, Snug, Flute, Snout, Starveling, Julia)
Lovers (Hermia, Demetrius, Lysander, Helena)
Older Fairies  (Puck, Oberon, Titania)
Younger Fairies (Pease-Blossom, Cobweb, Moth, Mustard-Seed, Pinecone, John Tataryn)

 

Group by group:
Athenians  - Act I.1; Act IV.1; Act V.1
Lovers - Act I.1; Act II.1; Act II.2;  Act III.2; Act IV.1; Act V.1
Troop - Act I.2; Act III.1; Act IV.2; Act V.1
Older Fairies - Act II.1; Act II.2; Act III.1; Act III.2; Act IV.1; Act V.1
Younger Fairies - Act II.2; Act III.1; Act IV.1; Act V.1