With my slightly more advanced classes (those with 1 or 2 years of Spanish) I got the students to write 5 questions in pairs on a mini whiteboard. The questions could be anything really but they had to have at least 1 question in past tense and 1 question in future tense. Once they were finished they practiced a little with each other. Then I set them up so they were all facing someone from a different group. The whiteboards stayed on one side of the desks and the students moved around place to place after exactly 1 minute when an alarm would go off. This meant they were reading and using other people's questions too. It worked incredibly well and the students loved moving around the room and chatting to each other.
With my beginner class the questions were scaffolded for them on the board with the first word of the answer to help them. It still seemed to work well for them even though they were asking the same questions at each spot but I didn't do as many rotations. Definitely a great activity I will be using again to drill certain structures.