We recently revisited this cozy, friendly spot after a 25 year absence. We had no reservations on a Thursday evening in September, but got a table after a reasonably short wait. Coming from the city where fajitas were invented (no, it's not a Mexican creation), we were impressed with the lamb fajitas, which were easily eaten despite the bone in one piece. We washed it down with a pair of margaritas, which were sour and tasted of bad tequila. The service and the ambience were excellent. At 45 euros just for the 2 fajita plates and a single guacamole dip, and a total bill of 80 euros including a small, drink-money tip, Alfonso's, like many other popular spots in the city, has become a little too pricy for our retired pocketbook.