Benches and Degrees (Russell)

So i've been trying to figure how to this model  is going to work for the  benches. The middle stairs is a perfect 90 degrees from the front of the room. but on the sides the walls curve around 30 degrees  so that makes the curve for the benches 60 degrees.

So for this i wrote down the number of seats for each section so I can work out what degree each bench needs to be so they can attach to each others. 

☺60/5 =12 degrees

☺60/6= 10 degrees

☺60/8=7.5 degrees

☺60/11=5.45 degrees

☺60/12=5 degrees

☺60/13=4.62 degrees 

☺60/17=3.53 degrees

So as you can see the curve gets less and less the more seats there are. So this rules out just copying a single bench over and over as it wont match up cover wise. So instead I'm debating making each row and using tileable textures so that i have use a 512 for wood and a 256 for grills and another 256 for the tops of the benches.  this would mean i can have the same amount of pixel detail instead of trying to fit every row in to a single 1024.