The main conference night is Wednesday 21 June. Some good accommodation options are detailed below. 

Hotel Isaacs (update - now booked out)
48 MacCurtain Street, Cork
Room rates: Room/single occupancy @ conference rate of €134 B&B, plus supplement of €10 for twin/double occupancy.
Reservations: +353 (21) 450 0011 reservations@hostelisaacscork.com quote 'Theatre Forum' to get conference rates
62 metres from Everyman.

Ambassador Hotel 
Military Hill, St. Luke's Cross, Cork 
Room rates: Single Occupancy - €136.00 per room per night B&B
Double Occupancy - €146.00 per room per night B&B
Reservations:+353 (21) 4539000 email rhona(at)ambassadorhotel.ie quote 'Theatre Forum' to get conference rates
850 metres from Everyman.

Maldron Hotel 
John Redmond Street, Shandon, Cork City
Room rates: Single Occupancy - €149.00 per room per night B&B
Reservations:+353 (21) 4529205 email fmckeown@maldron hotels.com quote 'Theatre Forum' to get conference rate. 
500 metres from Everyman.

Montenotte Hotel
Middle Glanmire Rd, Montenotte, Cork
Room rates: Room/single occupance @ conference rate of €159 B&B, plus supplement of €10 for twin/double occupancy
Reservations: +353 (0)21 453 0050 quote 'Theatre Forum' to get conference rates
1.22 km from Everyman.

Other accommodation in Cork

Airbnb
Have a look at Airbnb for accommodation options in Cork. 
Rates can range from €20 and up within Cork City. 

Kinlay House Cork
Bob & Joan's next to St. Ann's Church Bells, Shandon, Cork
500 metres from Everyman.

Ashely Hotel 
Coburg St, Shandon, Cork
150 metres from Everyman.

Bru Bar & Hostel 
57 MacCuratin Street, Cork
150 meters from Everyman.

Sheilas Hostel
4 Belgrave Place, Wellington Road, Cork
220 meters from Everyman. 

Oscar's Hostel Cork
111 Lower Glanmire Rd, Tivoli, Cork
950 metres from Everyman. 

Check out www.bookings.com for more accommodation in Cork.