Cafes with Wifi (a few picks):

 

Atticus Bookstore Cafe
1082 Chapel St.
New Haven, CT 06510
203.776 4040

Kasbah Garden Café (walking distance from Haskins Laboratories, ~ 10’)
105 Howe Street
New Haven, CT 06510
203.777.5033

Istanbul Café (near Haskins laboratories)
245 Crown Street
New Haven, CT 06510
(203) 787.3881

Woodland Café (near Haskins laboratories):
1044 Chapel Street
New Haven, CT 06510
203.773.1144

The Study at Yale (walking distance from Haskins Laboratories, ~ 10’)
1157 Chapel St
New Haven, CT 06511
203.562.2220