Easiest option for a small venue is to place the amp on a stand to allow it to throw the sound forward by being clear of the floor (orstick it on a decent chair providing it is secure on there, bit of gaffer tape helps).
Failing that, to go into a PA and have your effects be part of things, it's easier to just mike the amp and go into a PA via that. The obvious choice for doing that is a Shure SM57 and a mike stand for it. Be sure to have some spare leads and such to ensure you have enough cable length. Don't do what I see a lot of idiots doing, which is to drape the mike over the top of the amp so the mike is hanging over the speaker; an SM57's cardioid pickup pattern means it needs to be aimed at the speaker to amp it up properly without picking up extraneous noise from other sources, which is why you need a mike stand for it to achieve that.