Rainbow 4 is an Agogo bar located on the 2nd floor of Nana Plaza in Bangkok, renowned as a high-attractiveness venue, about a 5-minute walk from BTS Nana Station. It can be reached via the central staircase or the right-side elevator, and next to it is Rainbow 5 from the same group. This Agogo bar is part of the Rainbow series, with operating hours from 7:00 PM to 2:00 AM daily.

Inside Rainbow 4, the lighting is relatively dim, featuring two large stages with seating in standard high-top tables or benches. It's famous for the number and attractiveness of its girls. The girls wear sexy outfits, and things get more revealing after midnight, with some going topless. However, compared to other venues mainly catering to western customers, the performances here are much less impressive—don't get your hopes up.

Customer drinks start at about ฿150 per glass, with Barfine fees around ฿1,000 - ฿2,000. Short time starts from ฿3,000, and long time from ฿6,000, with prices on the higher side. Possibly due to steady business, some patrons report subpar service quality, with frequent requests for tips and drink pushing. Some girls may sit for a bit and then suggest you take them out—newbie insiders should be cautious.