I rented a scooter when I was in Madrid for a short trip and was glad I did, though it's not for everyone. I used BikesBooking and found several rental options near Atocha and Plaza de España. For scooter rental in Madrid https://bikesbooking.com/en/rent-a-scooter-in-Madrid/ my EU car license worked fine for 125cc models. It cost about €18 a day, with a small deposit. The main advantage was not having to wait for public transport, especially when I wanted to check out less touristy areas like Lavapiés and Chamberí. Madrid does have low-emission zones, but scooters are generally allowed if they meet Euro 3 or above. BikesBooking listed that info clearly. Traffic can get heavy during rush hour, so I avoided major avenues between 8–10 am and around 6 pm. Parking was surprisingly easy, and there are dedicated scooter spaces everywhere—just don’t block pedestrian zones. The rental included a helmet and lock, and the scooter was nearly new. It’s not ideal if you’re nervous about traffic, but I felt pretty safe sticking to side streets. Also, make sure to check fuel policy—mine was full-to-full, and it saved hassle. Definitely worth it if you’re planning to explore widely across the city.