Dhonburi Rajabhat University is very conveniently situated. It can be reached by BTS (Wongwian Yai station) and many buses. An MRT subway station should also open in the vicinity in the near future. From here, there are many buses (40, 56, 57,149, 177, 710) that can take you to different parts of Bangkok.
Bus 40 can take you to the southern bus station, Chinatown, the central railway station (Hua Lampong), Siam Paragon and to various stops on Sukhumvit Road.
A major gathering place for younger tourists and backpackers is Khaosan Road, where there are many restaurants, bars, food shops, and guesthouses. It is not far from the university. You can take Bus 56 to go there.
Bus 149 will take you to Sathorn Rd and Rama 4 Rd., Bus 177 to Silom Rd and other commercial areas