The Sussex Pub directory listing is always being updated considerably.
I have also just found theweald.org site which looks excellent.
Sussex Pubs Listings in 1899 Alphabetically listed & Trade Directory Listings from :
Alfriston, Alciston, Aldingbourne, Aldwick, Amberley, Angmering, Appledram, Ardingly, Arlington, Arundel , Ashburnham, Ashington, Ashurst,
Balcombe, Barcombe, Battle, Beckley, Beddingham, Lower Beeding, Upper Beeding, Bersted, Berwick, Bexhill, Billingshurst , Bognor , Brede ,
Camber, Catsfield, Chiddingly , Chichester , Crawley , Crowborough , Crowhurst, Cuckfield,
Eastbourne, Felpham, Findon, Fletching, Framfield, Frant, Fulking, Funtington,
Goring, Graffham, East Grinstead, West Grinstead,
Hailsham, Hastings , Haywards Heath , Hooe, Horsham , Herstmonceux , Icklesham, Lancing, Laughton, Lewes , Lindfield, Littlehampton , Litlington,
Midhurst ,
Netherfield , Newhaven , Ninfield, Northiam, Nuthurst, Pevensey, Pulborough , Robertsbridge, Rotherfield, Rudgwick, Rusper, Rye ,
St Leonards , Salehurst, Seaford, Sedlescombe, Shipley, Shoreham, Sompting, Southwick, Storrington , Stoughton,
Tunbridge Wells , Uckfield, Wadhurst, Westfield, Whatlington & Winchelsea, Worthing.
Parishes of the area from the Sussex FHS [opens a new browser]
This listing will grow as I add areas properly. Here are a few new areas: