It depends on some other factors. What kind of work will be done here" Will participants have lap tops? 30" space per participants is minimum. If they are using lap tops 36, preferably 48". About the longest table you're going to be able to use is a 10' model. That would leave you with 3.5' at each end. A 4'x10' rectangle table will seat 10 at 30" spaces (4 on each side + 1 at each end). This is tight in my opinion.

Whether ur house facing east

nothing u can do.. ur flat layout is very different and the toilet blocks has to be nearest to the duct side, and if u want to shift some other place , then it possible only when u break the existing flooring tiles with coba below to pass the wc pipeline and for that u have to raise the floor small area portion at least by 6" height excluding the floor coba height, i:e, after floor tiles... and the living & kitchen can be replaced the position only for the common toilet to shift

The White lotus interiors, it ranges from 28 to 32 depending on personal preferences and bosy size. There are a few hydraulic hardwares available where you can customise the height everytime table is used. Thanks, Nitin Cornerstone Designs Bangalore.