My husband and I are going to Mexico City next week for my brother's wedding. We've never been and are staying at a hotel in the southern part of the city (near the bride's family). We'd like to venture out on our own one night or day. Is a taxi through the hotel safe and since we don't speak Spanish, will we be ok on our own? We've been told by my brother and his fiancee that it's not smart for us to leave the hotel without them.