A way to customize the Reservation page options

Is there a way to customize the reservation form? things like the number of people, instead of individual numbers, I can put groups of ten (1-10, 10-20, etc)? Can I have drop down menu with the different rooms available for reservation if there is more than one room option? If I need to capture other information besides Name, Email, Phone number, can I add that to the form some where?

Thanks,
T