For our friends from London there are direct trains from Brighton back to London leaving at 23:37 and 00:10.
For Brighton Milongas you should be able to park down on the front but probably you will have a five minute walk. Look for spaces along Marine Parade or Madeira Drive.
For Brighton parking info see here.
On the meters it costs £2 for two hours and £3.20 for 4 hours. Parking is free after 8pm, so you only need to put enough in meter until 8pm.
If you travel by bus routes 1, 1A, 7, N7 14B, 14C, 23, 27C, 37, 37B, 47, 52, 57, 71, 73, 94A, 271 and 272 all stop outside the hospital which is a few yards from the Milonga. . From the train station the 1, 7, 37 and N7 are all great.
You can view bus times online or call Brighton and Hove Bus Company on 01273 886 200.