Choice of areas: Choose from a range of areas including upper abdomen, lower abdomen, flanks, thighs, hips and upper arms. One session:Feel the results with one session to help target areas you are unhappy with.. Fire Hut: Feel at ease at the Fire Hut in Woolwich. Ultrasonic fat cavitation: Bid unwanted bumps goodbye with ultrasonic fat cavitation. Break apart fat cells: Using ultrasonic radio waves to break apart fat cells allowing them to be absorbed into the body. Valid: Mon-Wed and Fri: 9am-5.30pm; Thu: 9am-8pm; Sat: 9am-5.30pm. Ultrasonic Cavitation Session | Regional | Living Social