Whether it is Bangkok yoga or any other version, there are unifying elements that make the ancient philosophy so applicable to present conditions. So universal is the practice that the appropriate mat isn’t necessary to practice the art of meditation.
But first, you need to take control of your breathing. This is fundamental to the philosophy anywhere in the world. It’s not yoga if it doesn’t involve pranayama, which is loosely translated into the breath of life.
By all means, if you have the mat at your disposal, go ahead and use it. The best thing about the spiritual practice is that it doesn’t require much to get by.
Case in point: You need a bicycle to go biking or inline skates to roller-blade. But with the age old philosophy to which transcendental meditation is central, you can practise anywhere you are and devoid of any gadget.