the outside seating at rose and crown is perfect, but very difficult to get. also, seating at the counter service in mexico affords good views. again, early bird gets the best seats. good luck!
Don't know about the size and numbers of tables, but the last time (maybe the time before, can't remember...) I was there we got to the R&C a little before 8 PM without a PS and I asked for a patio table and was seated within about 10 minutes- so I can't say it was difficult to obtain. Maybe I just got lucky