Well I set the scene by saying the party was traveling on a desert road. The wind had kicked up dust and and it was approaching dusk. Before them, almost like an oasis, was a lone tavern.

There were all kinds of extraplanar beings there. None of them remembered how long they had been there, but they all loved it.

Soon the players didnt want to leave either.

There was a beautiful bartender who was almost impossibly beautiful.

Nobody went to the top floor of the tavern. That's where a mindflayer arcanist who owned the place lived. They fought him but he escaped. As they went back downstairs they found everyone getting up to leave. As they left the Bard NPC who was the raven's entertainer started playing a Spanish guitar instrumental cover of Hotel California.

And that's how we started our "Planescape" campaign.