OK, so you can get off the train either at the Main Railway Station or at Petržalka Railway Station.
In case you get off at Main Railway Station, you should take the bus 93, and at the bus stop called Zochova, you change for the bus 90. Then get off at Eisteinova. (I guess it´s the next bus stop)
You will need one hour ticket for 70 eurocents.
But if you arrive in the afternoon, it´s not necessary to get to the concert venue immediately. (the concert venue called Incheba is huge, concrete, grayish and profoundly ugly if you ask me)
At the Zochava bus stop, you might just get in and out of the pedestrian underground crossing, and you are right in the historical city centre. It´s very small, you can have a walk or spend some time in some cafee and enjoy the atmosphere. As our city centre is very small, it won´t be difficult to find your way back to Zochova Bus Stop. Then you can take the bus 90.
In this case you will need two 15 minutes tickets, they cost 50 eurocents.
When you get off at Petrzalka Railway Station, just take the bus 80 and get off at Einsteinova, it´s the fourth station. (You will also need fifty minutes ticket.)
This is the website of Bratislava transport agency, you can opt for the English version.
http://www.imhd.zoznam.sk/ba/index.php? ... as=14%3A58
And if you don´t feel like using the public transport much, here are the cab numbers:
/the country code is + 421/
0216555 0902 222 333 0904 216 321
Cab drivers and assistants usually speak English, but in case they don´t, just pronounce "Som: Hlavna Stanica" "Do: Incheba".
If you take the cab standing on the street, tell them you have to get to Incheba....
fell free to ask me if you need more advice
hope you´ll enjoy it here....ok, we´ve got a few eyesores, but many charming places too.....