No Tumbler Fumbler

 is an achievement in Fallout: New Vegas which is awarded for successfully picking 25 locks.

This is one of the annoying achievements to get if you don't know where to look. I recommend getting a high lockpick skill at the beginning of the game. Any time you see a lock, you should probably pick it unless it would make a faction that you like hate you. In the strip's casinos, there are many locked doors that you can pick. If you make it a general habit to check your surroundings for locked doors, this achievement should unlock before the end of the game.

In the Tops Casino there are several doors to pick in the lobby where Benny's room is.